As filed with the Securities and Exchange Commission on October 25, 1999

                                                   Registration No. 333-74351
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  ------------

                       POST-EFFECTIVE AMENDMENT NO. 1 TO

                                    FORM S-1
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

                                  ------------


                                 Radio One, Inc.
             (Exact name of Registrant as specified in its charter)

                                  ------------

         Delaware                52-1166660                   4832
      (State or other         (I.R.S. Employer     (Primary Standard Industry
      jurisdiction of        Identification No.)      Classification Number)
     incorporation of
       organization)

                     5900 Princess Garden Parkway, 8th Floor
                                Lanham, MD 20706
                            Telephone: (301) 306-1111
       (Address, including zip code, and telephone number, including area
               code, of registrant's principal executive offices)

                                  ------------

                             ALFRED C. LIGGINS, III
                      Chief Executive Officer and President
                                 Radio One, Inc.
                     5900 Princess Garden Parkway, 8th Floor
                                Lanham, MD 20706
                            Telephone: (301) 306-1111
 (Name, address, including zip code, and telephone number, including area code,
                              of agent for service)

                                 With copies to:

      RICHARD L. PERKAL, ESQ.               ANTOINETTE COOK BUSH, ESQ.
          Kirkland & Ellis                  STEPHEN W. HAMILTON, ESQ.
     655 Fifteenth Street, N.W.             Skadden, Arps, Slate, Meagher &
       Washington, D.C. 20005               Flom LLP
     Telephone: (202) 879-5000              1440 New York Avenue, N.W.
                                            Washington, D.C. 20005
                                            Telephone: (202) 371-7000


                                --------------

  Approximate date of commencement of the proposed sale to the public: As soon
as practicable after this Registration Statement becomes effective.

  If any of the securities being registered on this Form are to be offered on a
delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933 (the "Securities Act"), check the following box. [_]

  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act Registration Statement number of the earlier
effective Registration Statement for the same offering. [_]

  If this Form is a post-effective amendment filed pursuant to Rule 462(c) under
the Securities Act, check the following box and list the Securities Act
Registration Statement number of the earlier effective Registration Statement
for the same offering. [_]

  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [X]

                         CALCULATION OF REGISTRATION FEE

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                                                         Proposed
                                                         Maximum
 Title of each Class of     Amount         Proposed     Aggregate    Amount of
    Securities to be        to be          Maximum       Offering   Registration
       Registered       Registered(/1/)  Offering Price  Price(/2/)    Fee(/3/)
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 Class A Common Stock,
  par value $0.001 per
  share................   7,150,000 Shares     $24.00     $171,600,000   $47,706
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(1) Includes 650,000 shares that the underwriters have the option to purchase
    from the Company to cover over-allotments, if any.
(2) Estimated solely for the purpose of calculating the registration fee
    pursuant to paragraph (o) of Rule 457 of the Securities Act.
(3) Previously paid.

                                ---------------



              EXPLANATORY NOTE TO POST-EFFECTIVE AMENDMENT NO. 1

     This Post-Effective Amendment No. 1 to the Radio One, Inc. Registration
Statement on form S-1 has been filed solely for the purpose of providing certain
information required for Item 13 in Part II of the Registration Statement.


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution.

The following table sets forth the estimated expenses to be incurred in
connection with the issuance and distribution of the securities being
registered, other than underwriting discounts and commissions, to be paid by
Radio One:



     SEC registration fee....................................... $   47,706
     Printing and engraving fees................................    495,000
     Legal fees and expenses....................................    921,000
     Accounting fees and expenses...............................    503,000
     Blue Sky fees and expenses.................................          0
     Trustee fees...............................................          0
     Directors' and Officers' Insurance.........................    264,000
     Miscellaneous..............................................    424,000
                                                                  ---------
       Total....................................................  2,654,706


Item 14. Indemnification of Directors and Officers.

  Radio One's Amended and Restated By-Laws incorporate substantially the
provisions of the General Corporation Law of the State of Delaware (the "DGCL")
in providing for indemnification of directors and officers against expenses,
judgments, fines, settlements and other amounts actually and reasonably incurred
in connection with any proceeding arising by reason of the fact that such person
is or was an officer or director of Radio One. In addition, Radio One is
authorized to indemnify employees and agents of Radio One and may enter into
indemnification agreements with its directors and officers providing mandatory
indemnification to them to the maximum extent permissible under Delaware law.

  Radio One's Amended and Restated Certificate of Incorporation provides that
Radio One shall indemnify (including indemnification for expenses incurred in
defending or otherwise participating in any proceeding) its directors and
officers to the fullest extent authorized or permitted by the DGCL, as it may be
amended, and that such right to indemnification shall continue as to a person
who has ceased to be a director or officer of Radio One and shall inure to the
benefit of his or her heirs, executors and administrators except that such right
shall not apply to proceedings initiated by such indemnified person unless it is
a successful proceeding to enforce indemnification or such proceeding was
authorized or consented to by the board of directors. Radio One's certificate of
incorporation also specifically provides for the elimination of the personal
liability of a director to the corporation and its stockholders for monetary
damages for breach of fiduciary duty as director. The provision is limited to
monetary damages, applies only to a director's actions while acting within his
or her capacity as a director, and does not entitle Radio One to limit director
liability for any judgment resulting from (a) any breach of the director's duty
of loyalty to Radio One or its stockholders; (b) acts or omissions not in good
faith or which involve intentional misconduct or a knowing violation of the law;
(c) paying an illegal dividend or approving an illegal stock repurchase; or (d)
any transaction from which the director derived an improper benefit.

  Section 145 of the DGCL provides generally that a person sued (other than in
a derivative suit) as a director, officer, employee or agent of a corporation
may be indemnified by the corporation for reasonable expenses, including counsel
fees, if the person acted in good faith and in a manner the person reasonably
believed to be in or not opposed to the best interests of the corporation, and,
with respect to any criminal action or proceeding, had no reasonable cause to
believe that the person's conduct was unlawful. In the case of a derivative
suit, a director, officer, employee or agent of the corporation may be
indemnified by the corporation for reasonable expenses, including attorneys'
fees, if the person has acted in good faith and in a manner the person
reasonably believed to be in or not opposed to the best interests of the
corporation, except that no indemnification shall be made in the case of a
derivative suit in respect of any claim as to, which such director, officer,

                                      II-1


employee or agent has been adjudged to be liable to the corporation unless the
Delaware Court of Chancery or the court in which such action or suit was brought
shall determine that such person is fairly and reasonably entitled to indemnity
for proper expenses. Indemnification is mandatory under section 145 of the DGCL
in the case of a director or officer who is successful on the merits in defense
of a suit against him.

  The Underwriting Agreement provides that the Underwriters are obligated,
under certain circumstances, to indemnify Radio One, the directors, certain
officers and controlling persons of Radio One, Inc. against certain liabilities,
including liabilities under the Securities Act. Reference is made to the form of
Underwriting Agreement filed as Exhibit 1.1 hereto.

  Radio One maintains directors and officers liability insurance for the benefit
of its directors and certain of its officers.

Item 15. Recent Sales of Unregistered Securities.

  On May 19, 1997, Radio One issued approximately $85.0 million (aggregate
principal amount) of 12% senior subordinated notes to certain investors. Such
notes were offered pursuant to Rule 144A under the Securities Act.

  On May 19, 1997, Radio One issued approximately $20.9 million of Series A and
Series B 15% senior cumulative preferred stock to certain investors. Such shares
were issued pursuant to the exemption from registration provided by Section 4(2)
of Securities Act.

  On January 25, 1999, Radio One issued an aggregate of 51,192 shares of common
stock to its Chief Financial Officer. These shares were issued pursuant to the
exemption from registration provided by Rule 701 under the Securities Act.

  On February 25, 1999, pursuant to a plan of recapitalization, Radio One
issued to the holders of its class A common stock, in exchange for all of the
outstanding shares of class A common stock, 46.15 shares of class B common stock
and 92.3 shares of class C common stock. These shares were issued pursuant to
the exemption from registration provided by Section 4(2) of the Securities Act.

  On March 30, 1999, Radio One issued approximately 3.3 million shares of
common stock to the shareholders of ROA in connection with Radio One's
acquisition of ROA. These shares were issued pursuant to the exemption from
registration provided by Section 4(2) of the Securities Act.

Item 16. Exhibits and Financial Statement Schedules.

  (a) The following exhibits are filed as part of this registration statement.

1.1        Form of Underwriting Agreement
3.1        Form of Amended and Restated Certificate of Incorporation of
           Radio One, Inc.
3.2(/5/)   Amended and Restated By-laws of Radio One, Inc.
4.1(/1/)   Indenture dated as of May 15, 1997 among Radio One, Inc., Radio One
           Licenses, Inc. and United States Trust Company of New York.
4.2(/2/)   First Supplemental Indenture dated as of June 30, 1998, to
           Indenture dated as of May 15, 1997, by and among Radio One, Inc.,
           as Issuer and United States Trust Company of New York, as Trustee,
           by and among Radio One, Inc., Bell Broadcasting Company, Radio One
           of Detroit, Inc., and United States Trust Company of New York, as
           Trustee.

- ---------
  (1) Incorporated by reference to Radio One's Annual Report on Form 10-K for
the period ended December 31, 1997 (File No. 333-30795; Film No. 98581327).

  (2) Incorporated by reference to Radio One's Current Report on Form 8-K filed
July 13, 1998 (File No. 333-30795; Film No. 98665139).

  (3) Incorporated by reference to Radio One's Current Report on Form 8-K filed
January 12, 1999 (File No. 333-30795; Film No. 99504706).

  (4) Incorporated by reference to Radio One's Quarterly Report on Form 10-Q
for the period ended June 30, 1998 (File No. 333-30795; Film No. 98688998).

  (5) Previously filed with Radio One's Registration Statement on Form S-1
filed on March 12, 1999 (File No. 333-74351; Film No. 99564316).

  (6) Incorporated by reference to Radio One's Annual Report on Form 10-K for
the period ended December 31, 1998 (File No. 333-30795; Film No. 99581532).

  (7) Incorporated by reference to Radio One's Amendment No. 1 to its
Registration Statement on Form S-1 filed April 6, 1999 (File No. 333-74351;
Film No. 99588274).

  (8) Incorporated by reference to Radio One's Amendment No. 2 to its
Registration Statement on Form S-1 filed April 13, 1999 (File No. 333-74351;
Film No. 99593007).

  (9) Incorporated by reference to Radio One's Amendment No. 3 to its
registration statement on Form S-1 filed on April 14, 1999 (File No. 333-
74351; Film No. 99593769).

  (10) To be filed by Amendment to this Registration Statement on Form S-1.

                                      II- 2


4.3(/3/)        Second Supplemental Indenture dated as of December 23, 1998,
                to Indenture dated as of May 15, 1997, by and among Radio One,
                Inc., as Issuer and United States Trust Company of New York,
                as Trustee, by and among Radio One, Inc., Allur- Detroit,
                Allur Licenses, Inc., and United States Trust Company of New
                York, as Trustee.
4.3(/1/)        Purchase Agreement dated as of May 14, 1997 among Radio One,
                Inc., Radio One Licenses, Inc., Credit Suisse First Boston
                Corporation and NationsBanc Capital Markets, Inc.
4.5(/1/)        Registration Rights Agreement dated as of May 14, 1997 among
                Radio One, Inc., Radio One Licenses, Inc., Credit Suisse First
                Boston Corporation and NationsBanc Capital Markets, Inc.
4.6(/1/)        Standstill Agreement dated as of May 19, 1997 among Radio One,
                Inc., Radio One Licenses, Inc., NationsBank of Texas, N.A.,
                United States Trust Company of New York and the other parties
                thereto.
4.7(/4/)        Standstill Agreement dated as of June 30, 1998 among Radio
                One, Inc., the subsidiaries of Radio One, Inc., United States
                Trust Company of New York and the other parties thereto.
5.1             Form of Opinion and consent of Kirkland & Ellis.
10.1(/1/)       Office Lease dated February 3, 1997 between National Life
                Insurance Company and Radio One, Inc. for premises located at
                5900 Princess Garden Parkway, Lanham, Maryland, as amended on
                February 24, 1997.
10.2(/1/)       Purchase Option Agreement dated February 3, 1997 between
                National Life Insurance Company and Radio One, Inc. for the
                premises located at 5900 Princess Garden Parkway, Lanham,
                Maryland.
10.3(/1/)       Office Lease commencing November 1, 1993 between Chalrep Limited
                Partnership and Radio One, Inc., with respect to the property
                located at 100 St. Paul Street, Baltimore, Maryland.
10.4(/1/)       Preferred Stockholders' Agreement dated as of May 14, 1997 among
                Radio One, Inc., Radio One Licenses, Inc. and the other parties
                thereto.
10.5(/4/)       First Amendment to Preferred Stockholders' Agreement dated as
                of June 30, 1998 among Radio One, Inc., Radio One Licenses,
                Inc., and the other parties thereto.
10.6(/1/)       Warrantholders' Agreement dated as of June 6, 1995, as amended
                by the First Amendment to Warrantholders' Agreement dated as
                of May 19, 1997, among Radio One, Inc., Radio One Licenses,
                Inc. and the other parties thereto.
10.7(/1/)       Amended and Restated Warrant of Radio One, Inc. dated as of May
                19, 1997, issued to Syncom Capital Corporation.
10.8(/1/)       Amended and Restated Warrant of Radio One, Inc. dated as of May
                19, 1997, issued to Alliance Enterprise Corporation.
10.9(/1/)       Amended and Restated Warrant of Radio One, Inc. dated as of May
                19, 1997, issued to Greater Philadelphia Venture Capital
                Corporation, Inc.
10.10(/1/)      Amended and Restated Warrant of Radio One, Inc. dated as of May
                19, 1997, issued to Opportunity Capital Corporation.
10.11(/1/)      Amended and Restated Warrant of Radio One, Inc. dated as of May
                19, 1997, issued to Capital Dimensions Venture Fund, Inc.
10.12(/1/)      Amended and Restated Warrant of Radio One, Inc. dated as of May
                19, 1997, issued to TSG Ventures Inc.

- ---------
  (1) Incorporated by reference to Radio One's Annual Report on Form 10-K for
the period ended December 31, 1997 (File No. 333-30795; Film No. 98581327).

  (2) Incorporated by reference to Radio One's Current Report on Form 8-K filed
July 13, 1998 (File No. 333-30795; Film No. 98665139).

  (3) Incorporated by reference to Radio One's Current Report on Form 8-K filed
January 12, 1999 (File No. 333-30795; Film No. 99504706).

  (4) Incorporated by reference to Radio One's Quarterly Report on Form 10-Q
for the period ended June 30, 1998 (File No. 333-30795; Film No. 98688998).

  (5) Previously filed with Radio One's Registration Statement on Form S-1
filed on March 12, 1999 (File No. 333-74351; Film No. 99564316).

  (6) Incorporated by reference to Radio One's Annual Report on Form 10-K for
the period ended December 31, 1998 (File No. 333-30795; Film No. 99581532).

  (7) Incorporated by reference to Radio One's Amendment No. 1 to its
Registration Statement on Form S-1 filed April 6, 1999 (File No. 333-74351;
Film No. 99588274).

  (8) Incorporated by reference to Radio One's Amendment No. 2 to its
Registration Statement on Form S-1 filed April 13, 1999 (File No. 333-74351;
Film No. 99593007).

  (9) Incorporated by reference to Radio One's Amendment No. 3 to its
Registration Statement on Form S-1 filed on April 14, 1999 (File
No. 333-74351; Film No. 99593769).

 (10) To be filed by Amendment to this Registration Statement on Form S-1.


                                     II-3


10.13(/1/)    Amended and Restated Warrant of Radio One, Inc. dated as of May
              19, 1997, issued to Fulcrum Venture Capital Corporation.
10.14(/1/)    Amended and Restated Warrant of Radio One, Inc. dated as of May
              19, 1997, issued to Alta Subordinated Debt Partners III, L.P.
10.16(/1/)    Amended and Restated Warrant of Radio One, Inc. dated as of May
              19, 1997, issued to Grant M. Wilson.
10.17(/4/)    Credit agreement dated June 30, 1998 among Radio One, Inc., as the
              borrower and NationsBank, N.A., as Documentation Agent and Credit
              Suisse First Boston as the Agent.
10.18(/1/)    Management Agreement dated as of August 1, 1996 by and between
              Radio One, Inc. and Radio One of Atlanta, Inc.
10.19(/1/)    Fifth Amendment dated as of July 31, 1997 to that certain Letter
              of Intent dated March 12, 1997 by and between Radio One, Inc. and
              Allied Capital Financial Corporation, as amended.
10.20(/1/)    Sixth Amendment dated as of September 8, 1997 to that certain
              Letter of Intent dated March 12, 1997 by and between Radio One,
              Inc. and Allied Capital Financial Corporation, as amended.
10.21(/1/)    Time Management and Services Agreement dated March 17, 1998, among
              WYCB Acquisition Corporation, Broadcast Holdings, Inc., and Radio
              One, Inc.
10.22(/1/)    Stock Purchase Agreement dated December 23, 1997, between the
              shareholders of Bell Broadcasting Company and Radio One, Inc.
10.23(/1/)    Option and Stock Purchase Agreement dated November 19, 1997, among
              Allied Capital Financial Corporation, G. Cabell Williams III,
              Broadcast Holdings, Inc. and WYCB Acquisition Corporation.
10.24(/1/)    Amended and Restated Warrant of Radio One, Inc., dated January 9,
              1998, issued to TSG Ventures L.P.
10.25(/1/)    Stock Purchase Warrant of Radio One, Inc., dated March 16, 1998
              issued to Allied Capital Financial Corporation.
10.26(/1/)    Amended and Restated credit agreement dated May 19, 1997 among
              several lenders, NationsBank of Texas, N.A. and Radio One, Inc.
10.27(/1/)    First Amendment to credit agreement dated December 31, 1997 among
              several lenders, NationsBank of Texas, N.A. and Radio One, Inc.
10.28(/1/)    Amendment to Preferred Stockholders' Agreement dated as of
              December 31, 1997 among Radio One, Inc., Radio One Licenses, Inc.
              and the other parties thereto.
10.29(/1/)    Assignment and Assumption Agreement dated October 23, 1997,
              between Greater Philadelphia Venture Capital Corporation, Inc. and
              Alfred C. Liggins, III.
10.30(/1/)    Agreement dated February 20, 1998 between WUSQ License Limited
              Partnership and Radio One, Inc.
10.31(/4/)    Amended and Restated Warrant of Radio One, Inc. dated as of June
              30, 1998 issued to Capital Dimensions Venture Fund Inc.
10.32(/4/)    Amended and Restated Warrant of Radio One, Inc. dated as of June
              30, 1998 issued to Fulcrum Venture Capital Corporation.
10.33(/4/)    Amended and Restated Warrant of Radio One, Inc. dated as of June
              30, 1998 issued to Syncom Capital Corporation.
10.34(/4/)    Amended and Restated Warrant of Radio One, Inc. dated as of June
              30, 1998 issued to Alfred C. Liggins, III.
10.35(/4/)    Amended and Restated Warrant of Radio One, Inc. dated as of June
              30, 1998 issued to TSG Ventures L.P.
10.36(/4/)    Amended and Restated Warrant of Radio One, Inc. dated as of June
              30, 1998 issued to Alliance Enterprise Corporation.

- ---------
  (1) Incorporated by reference to Radio One's Annual Report on Form 10-K for
the period ended December 31, 1997 (File No. 333-30795; Film No. 98581327).

  (2) Incorporated by reference to Radio One's Current Report on Form 8-K filed
July 13, 1998 (File No. 333-30795; Film No. 98665139).

  (3) Incorporated by reference to Radio One's Current Report on Form 8-K filed
January 12, 1999 (File No. 333-30795; Film No. 99504706).

  (4) Incorporated by reference to Radio One's Quarterly Report on Form 10-Q
for the period ended June 30, 1998 (File No. 333-30795; Film No. 98688998).

  (5) Previously filed with Radio One's Registration Statement on Form S-1
filed on March 12, 1999 (File No. 333-74351; Film No. 99564316).

  (6) Incorporated by reference to Radio One's Annual Report on Form 10-K for
the period ended December 31, 1998 (File No. 333-30795; Film No. 99581532).

  (7) Incorporated by reference to Radio One's Amendment No. 1 to its
Registration Statement on Form S-1 filed April 6, 1999 (File No. 333-74351;
Film No. 99588274).

  (8) Incorporated by reference to Radio One's Amendment No. 2 to its
Registration Statement on Form S-1 filed April 13, 1999 (File No. 333-74351;
Film No. 99593007).

  (9) Incorporated by reference to Radio One's Amendment No. 3 to its
Registration Statement on Form S-1 filed on April 14, 1999 (File
No. 333-74351; Film No. 99593769).

 (10) To be filed by Amendment to this Registration Statement on Form S-1.

                                     II-4


10.37(/4/)  Amended and Restated Warrant of Radio One, Inc. dated as of June 30,
            1998 issued to Alta Subordinated Debt Partners III, L.P.
10.38(/4/)  Amended and Restated Warrant of Radio One, Inc. dated as of June 30,
            1998 issued to BancBoston Investments Inc.
10.39(/4/)  Amended and Restated Warrant of Radio One, Inc. dated as of June 30,
            1998 issued to Grant M. Wilson.
10.40(/9/)  Merger Agreement dated as of March 30, 1999 relating to the
            acquisition of Radio One of Atlanta, Inc.
10.41(/9/)  Asset Purchase Agreement dated as of November 23, 1998 (as amended
            on December 4, 1998) relating to the acquisition of WFUN-FM,
            licensed to Bethalto, Illinois.
10.42(/9/)  Asset Purchase Agreement relating to the Acquisition of WENZ-FM and
            WERE-AM, both licensed to Cleveland, Ohio.
10.43(/9/)  Asset Purchase Agreement dated as of February 10, 1999 relating to
            the acquisition of WDYL-FM, licensed to Chester, Virginia.
10.44(/9/)  Asset Purchase Agreement dated as of February 26, 1999 relating to
            the acquisition of WJKS-FM, licensed to Crewe Virginia, and WSOJ-FM,
            licensed Petersburg, Virginia.
10.45       Letter of Intent, dated as of February 23, 1999, relating to the
            acquisition of WCDX-FM, licensed to Mechanicsville, Virginia,
            WPLZ-FM, licensed to Petersburg, Virginia, WJRV-FM licensed to
            Richmond, Virginia, and WGCV-AM licensed to Petersburg, Virginia.
10.46(/6/)  Stock Purchase Agreement dated as of October 26, 1998, by and
            between Radio One and Syndicated Communications Venture Partners,
            II, L.P.
10.47(/9/)  Second Amendment to Preferred Stockholders' Agreement dated as of
            November 23, 1998 among Radio One, Inc., Radio One Licenses, Inc.
            and the other parties thereto.
10.48(/9/)  Third Amendment to Preferred Stockholders' Agreement dated as of
            December 23, 1998 among Radio One, Inc., Radio One Licenses, Inc.
            and the other parties thereto.
10.49(/9/)  Fourth Amendment to Preferred Stockholders' Agreement dated as of
            December 31, 1998 among Radio One, Inc., Radio Once Licenses, Inc.
            and the other parties thereto.
10.50(/9/)  Amended and Restated Credit Agreement dated as of February 26, 1999,
            among Radio One, Inc., as the borrower, and Nations Bank, N.A., as
            Administrative Agent, and Credit Suisse First Boston, as the
            Documentation Agent.
10.51(/9/)  Fifth Amendment to Preferred Stockholders' Agreement dated as of
            February 26, 1999 among Radio One, Inc., Radio One Licenses, Inc.
            and the other parties thereto.
21.1(/5/)   Subsidiaries of Radio One, Inc.
23.5(/7/)   Consent of Larry Marcus
27.1        Financial Data Schedule (included on pages S1-S3).


- ---------
   (1) Incorporated by reference to Radio One's Annual Report filed on Form 10-
K for the period ended December 31, 1997 (File No. 333-30795; Film No.
98581327).

   (2) Incorporated by reference to Radio One's Current Report on Form 8-K filed
July 13, 1998 (File No. 333-30795; Film No. 98665139).

   (3) Incorporated by reference to Radio One's Current Report on Form 8-K filed
January 12, 1999 (File No. 333-30795; Film No. 99504706).

   (4) Incorporated by reference to Radio One's Quarterly Report on Form 10-Q
for the period ended June 30, 1998 (File No. 333-30795; Film No. 98688998).

   (5) Previously filed with Radio One's Registration Statement on Form S-1
filed on March 12, 1999 (File No. 333-74351; Film No. 99564316).

   (6) Incorporated by reference to Radio One's Annual Report on Form 10-K for
the period ended December 31, 1998 (File No. 333-30795; Film No. 99581532).

   (7) Incorporated by reference to Radio One's Amendment No. 1 to its
Registration Statement on Form S-1 filed April 6, 1999 (File No. 333-74351;
Film No. 99588274).

   (8) Incorporated by reference to Radio One's Amendment No. 2 to its
Registration Statement on Form S-1 filed April 13, 1999 (File No. 333-74351;
Film No. 99593007).

   (9) Incorporated by reference to Radio One's Amendment No. 3 to its
Registration Statement on Form S-1 filed April 13, 1999 (File No. 333-74351;
Film No. 99593007).

 (10) To be filed by Amendment to this Registration Statement on Form S-1.

Item 17. Undertakings.
   Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
registrant pursuant to provisions described in Item 14 above, or otherwise, the
registrant has been advised that in the opinion of the SEC such indemnification
is against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the registrant of expenses incurred or
paid by a director, officer

                                      II-5


or controlling person of the registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.

  The undersigned registrant hereby undertakes that:

    (1) For purposes of determining any liability under the Securities Act, the
  information omitted from the form of prospectus filed as part of this
  registration statement in reliance upon Rule 430A and contained in the form of
  prospectus filed by the registrant pursuant to Rule 424 (b) (1) or (4) or 497
  (h) under the Securities Act shall be deemed to be part of this registration
  statement as of the time it was declared effective.

    (2) For the purpose of determining any liability under the Securities Act,
  each post-effective amendment that contains a form of prospectus shall be
  deemed to be a new registration statement relating to the securities offered
  therein, and the offering of such securities at that time shall be deemed to
  be the initial bona fide offering thereof.

  The undersigned registrant hereby undertakes to provide to the underwriters at
the closing specified in the Underwriting Agreement, certificates in such
denominations and registered in such names as required by the underwriters to
permit prompt delivery to each purchaser.

                                      II-6


                                   SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, as amended, the
registrant has duly caused this Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in Lanham, Maryland on
October 25, 1999.

                                             RADIO ONE, INC.

                                        BY: /s/ Alfred C. Liggins, III
                                        ---------------------------------
                                        Name: Alfred C. Liggins, III
                                        Title: President and Chief Executive
                                               Officer


                                      II-7


                                   SIGNATURES

  Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed on behalf of the following persons by
Scott R. Royster, their true and lawful attorney, on the date indicated.

                                 Radio One, Inc.



        Signature                   Title(s)                         Date
        ---------                   --------                         ----

/s/ Catherine L. Hughes       Chairperson of the             October 25, 1999
- ---------------------------    Board of Directors
    Catherine L. Hughes

    /s/ Terry L. Jones        Director                       October 25, 1999
- ---------------------------
      Terry L. Jones

   /s/ Brian W. McNeill       Director                       October 25, 1999
- ---------------------------
     Brian W. McNeill

                              Director                       October 25, 1999
- ---------------------------
     Larry D. Marcus

/s/ Alfred C. Liggins, III    President and Chief            October 25, 1999
- ---------------------------    Executive Officer
  Alfred C. Liggins, III       (Principal Executive Officer)
                               and Director

   /s/ Scott R. Royster       Executive Vice President and   October 25, 1999
- ---------------------------    Chief Financial Officer
     Scott R. Royster          (Principal Financial and
                               Accounting Officer)



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