EXHIBIT 5.1

                                  April 10, 1998

Sinclair Broadcast Group, Inc.
2000 West 41st Street
Baltimore, Maryland 21211

         Re:   Sinclair Broadcast Group, Inc. Registration Statement on Form S-3
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Dear Ladies and Gentlemen:

         We have acted as counsel to Sinclair  Broadcast Group, Inc., a Maryland
corporation  (the  "Company"),  in connection with  Registration  Statements (as
amended, and including prospectus  supplements filed pursuant to Rule 424 of the
Securities Act of 1933, the  "Registration  Statements")  on Form S-3 filed with
the Securities and Exchange  Commission (the "Commission")  under the Securities
Act of 1933, as amended. The Registration  Statements relate to the registration
of the  issuance by the Company of  6,000,000  shares of Class A Common Stock of
the Company, par value $0.01 per share (the "Class A Common Stock") and the sale
by certain Selling Stockholders  identified therein of up to 2,030,187 shares of
Class A Common Stock (together with the 6,000,000 shares of Class A Common Stock
offered by the Company, the "Class A Common Shares").  The Class A Common Shares
are  to be  sold  pursuant  to an  Underwriting  Agreement  (the  "Common  Stock
Underwriting  Agreement") by and among the Company, certain Selling Stockholders
named  therein,  and Salomon  Smith Barney,  Smith Barney Inc.,  BT Alex.  Brown
Incorporated,  Credit Suisse First Boston Corporation, Bear, Stearns & Co. Inc.,
Furman Selz LLC,  Goldman,  Sachs & Co.,  Lehman  Brothers Inc. and  NationsBanc
Montgomery  Securities LLC (the  "Representatives"),  as  representatives of the
Underwriters.

         For the  purposes  of this  opinion,  we have  examined  copies  of the
following documents:

         1. The Registration Statements;

         2. The Amended and Restated Articles of Incorporation of the Company;

         3. The Bylaws of the Company;

         4. The Common Stock Underwriting Agreement;



Sinclair Broadcast Group, Inc.
April 10, 1998
Page 2


         5. The Resolutions of the Board of Directors of the Company dated April
7, 1998.

         In our  examination  of the  aforesaid  documents,  we have assumed the
legal capacity of all natural  persons,  the genuineness of all signatures,  the
completeness and authenticity of all documents submitted to us as originals, the
conformity to original documents of all documents  submitted to us as certified,
telecopied, photostatic or reproduced copies.

         This opinion is limited to the laws of the United State and the General
Corporation Law of Maryland.  We are members of the Bar of the State of Maryland
and do not  hold  ourselves  out as  being  experts  in the  laws  of any  other
jurisdiction.  Our  opinion is  rendered  only with  respect to the laws and the
rules, regulations and orders thereunder that are currently in effect.

         Based upon,  subject to, and  limited by the  foregoing,  we are of the
opinion  that  (i) the  Class A  Common  Shares  have  been  lawfully  and  duly
authorized (ii) the Class A Common Shares to be sold by the Company, when issued
and  delivered in  accordance  with the terms of the Common  Stock  Underwriting
Agreement,  will be  validly  issued,  fully paid and  nonassessable,  and (iii)
assuming conversion of Series B Preferred Stock held by the Selling Stockholders
into Class A Common  Stock  pursuant to the terms of the  Amended  and  Restated
Articles  of the  Company,  the Class A Common  Shares to be sold by the Selling
Stockholders, will be validly issued, fully paid and non-assessable.

         We assume no  obligation  to advise you of any changes in the foregoing
subsequent  to the  delivery of this  opinion.  This  opinion has been  prepared
solely  for your use in  connection  with the filing of the Form 8-K on April 9,
1998 (the "Form  8-K") and  incorporation  by  reference  into the  Registration
Statements,  and  should  not be  quoted  in  whole or in part or  otherwise  be
referred to, nor otherwise be filed with or furnished to any governmental agency
or other person or entity, without our express prior written consent.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Form 8-K and incorporation by reference into the Registration  Statements and to
the use of our name therein under the caption "Legal Matters."

                                   Sincerely,

                                   WILMER, CUTLER & PICKERING

                                   By:  /s/ John B. Watkins
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                                            John B. Watkins, a partner