SHUMAKER WILLIAMS, P.C.
                                  P.O. BOX 88
                              HARRISBURG, PA 17108
                                 (717) 763-1121



                                 April 30, 1998


Mr. Eugene F. Shaffer                               Mr. Franklin W. Ruth, Jr.
President, Chairman and CEO                         President and CEO
Mid Penn Bancorp, Inc.                              Miner's Bank of Lykens
349 Union Street                                    550 Main Street
Millersburg, PA  17061                              Lykens, PA  17048

                  RE:      Merger of Miner's Bank of Lykens
                           Our File No. 517-98

Gentlemen:

     We have acted as special counsel to Mid Penn Bancorp,  Inc. ("Bancorp") and
its wholly-owned subsidiary,  Mid Penn Bank ("Mid Penn"), in connection with the
registration  under  the  Securities  Act of  1933,  as  amended,  by means of a
registration  statement on Form S-4 (the  "Registration  Statement")  of 148,250
shares of the common stock of Bancorp,  par value $1.00 per share (the  "Bancorp
Common  Stock") to be issued  pursuant to the terms of an Agreement  and Plan of
Reorganization,  dated  January 9, 1998,  (the  "Agreement")  entered into among
Bancorp, Mid Penn and Miner's Bank of Lykens ( the "Bank").

     Upon consummation of the transaction contemplated by the Agreement: (i) the
Bank will merge  with,  into and under the  charter of Mid Penn (the  "Merger");
(ii) Mid Penn will survive the Merger;  (iii) all of the  outstanding  shares of
common stock of the Bank,  par value $5.00 per share (the "Bank  Common  Stock")
will be  converted  into the right to receive ten (10) shares of Bancorp  Common
Stock;  and (iv) each  shareholder  of the Bank will receive cash in lieu of any
fractional shares of Bancorp Common Stock.










Mr. Eugene F. Shaffer
President, Chairman and CEO
Mid Penn Bancorp, Inc.
Mr. Franklin W. Ruth
President and CEO
Miners Bank of Lykens
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Page 2


     This opinion is rendered  pursuant to the requirements of Item 601(b)(5)(i)
of  Regulation  S-K  of  the  Securities  and  Exchange  Commission  (17  C.F.R.
ss.229.601(b)(5)(i)) for inclusion as an exhibit to the Registration Statement.


     In connection with the  preparation of this opinion,  we have examined such
documents  and  corporate  and other  records  and  questions  of law as we deem
necessary or appropriate.

     Based upon the  foregoing  and  subject  to the  conditions  that:  (i) all
conditions  precedent  to  the  obligations  of the  parties  set  forth  in the
Agreement will have been satisfied at the time of the Merger; (ii) all covenants
required to be performed by the parties as set forth in the Agreement  will have
been  performed  by them at the time of the  Merger;  and  (iii)  the  shares of
Bancorp Common Stock will be issued in strict  accordance  with the terms of the
Agreement,  we are of the opinion  that the Bancorp  Common  Stock has been duly
authorized  and,  when  issued,   will  be  legally   issued,   fully  paid  and
non-assessable.

     In rendering the foregoing opinion,  we have assumed without  investigation
that: (i) Bank has full corporate power and authority to execute and deliver the
Agreement  and to carry  out the  transactions  contemplated  therein;  (ii) the
Agreement has been duly  executed and delivered by Bank and  constitutes a valid
and binding obligation of Bank; (iii) all corporate actions required to be taken
by Bank to  authorize  the  execution  and  delivery  of the  Agreement  and the
performance of the transactions contemplated therein will have been taken at the
time of the  Merger;  and  (iv) the  shares  of Bank  Common  Stock  issued  and
outstanding at the time of the Merger are duly authorized, validly issued, fully
paid and non-assessable.

     We hereby  consent to the  inclusion  of this  opinion as an exhibit to the
Registration  Statement  and to the  reference to our firm in the section of the
Registration Statement entitled "Legal Opinions".

                                               SHUMAKER WILLIAMS, P.C.



                                               /s/ Nicholas Bybel, Jr.
                                               -------------------------------
                                      By:      Nicholas Bybel, Jr.