EXHIBIT 5.1

                   OPINION OF MALIZIA SPIDI & FISCH, PC AS TO
                THE VALIDITY OF THE COMMON STOCK BEING REGISTERED



                           MALIZIA SPIDI & FISCH, PC
                                ATTORNEYS AT LAW

1301 K STREET, N.W.                                             637 KENNARD ROAD
SUITE 700 EAST                                 STATE COLLEGE, PENNSYLVANIA 16801
WASHINGTON, D.C. 20005                                            (814) 466-6625
(202) 434-4660                                         FACSIMILE: (814) 466-6703
FACSIMILE: (202) 434-4661



June 29, 2000

Board of Directors
IBT Bancorp, Inc.
309 Main Street
Irwin, Pennsylvania  15642

            RE:            Registration Statement on Form S-8:
                           ----------------------------------
                           IBT Bancorp, Inc. 2000 Stock Option Plan

 Gentlemen:

         We have acted as special  counsel to IBT Bancorp,  Inc., a Pennsylvania
corporation  (the  "Company"),   in  connection  with  the  preparation  of  the
Registration  Statement on Form S-8 to be filed with the Securities and Exchange
Commission (the  "Registration  Statement") under the Securities Act of 1933, as
amended,  relating to 300,000 shares of common stock,  par value $1.25 per share
(the  "Common  Stock") of the Company  which may be issued upon the  exercise of
options  granted or which may be granted under the IBT Bancorp,  Inc. 2000 Stock
Option Plan (the "Plan"), as more fully described in the Registration Statement.
You have  requested  the  opinion of this firm with  respect  to  certain  legal
aspects of the proposed offering.

         We have examined such documents, records, and matters of law as we have
deemed  necessary for purposes of this opinion and based thereon,  we are of the
opinion that the Common Stock when issued  pursuant to the stock awards  granted
under and in  accordance  with the  terms of the Plan  will be duly and  validly
issued, fully paid, and nonassessable.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration Statement on Form S-8.

                                        Sincerely,



                                        /s/Malizia Spidi & Fisch, PC
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                                        Malizia Spidi & Fisch, PC