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                                     Exhibit 5
                       Opinion of Muldoon Murphy and Faucette LLP






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                                 August 14, 2001



Board of Directors
Security Financial Bancorp, Inc.
9321 Wicker Avenue
St. John, Indiana 46373

      Re:   Security Financial Bancorp, Inc. 2000 Stock-Based Incentive Plan
            Registration Statement on Form S-8 for Offer and Sale of
            271,384 Shares of Common Stock

Ladies and Gentlemen:

      We have been  requested by Security  Financial  Bancorp,  Inc., a Delaware
corporation  (the  "Company"),  to issue a legal opinion in connection  with the
registration  (the  "Registration")  of 271,384  shares of the Company's  Common
Stock,  $.01 par value (the  "Shares"),  on Form S-8 under the Securities Act of
1933.  The  Registration  covers  193,846  Shares  that may be  issued  upon the
exercise  of  stock  options  and  77,538  Shares  that  may be  distributed  as
restricted  stock  awards  under  the  Security  Financial  Bancorp,  Inc.  2000
Stock-Based Incentive Plan (the "Plan").

      We have made such  legal and  factual  examinations  and  inquiries  as we
deemed advisable for the purpose of rendering this opinion.  In our examination,
we have  assumed and have not verified (i) the  genuineness  of all  signatures,
(ii) the authenticity of all documents  submitted to us as originals,  (iii) the
conformity  with the  originals of all documents  supplied to us as copies,  and
(iv) the accuracy and completeness of all corporate records and documents and of
all certificates and statements of fact, in each case given or made available to
us by the Company or its subsidiary.

      Based on the  foregoing and limited in all respects to Delaware law, it is
our opinion that the Shares  reserved  under the Plan have been duly  authorized
and, upon payment for and issuance of the Shares in the manner  described in the
Plan, will be legally issued, fully paid and nonassessable.

      The following  provisions of the Certificate of  Incorporation of Security
Financial  Bancorp,  Inc.,  may not be given  effect  by, or may be  subject  to
equitable  limitations  by, a court applying  Delaware law, but, in our opinion,
any failure to give effect to, or limitations  placed upon, such provisions will
not affect the duly  authorized,  validly issued,  fully paid and  nonassessable
status of the Common Stock:




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Board of Directors
Security Financial Bancorp, Inc.
August 14, 2001
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      (a)   Subsections C.3 and C.6 of Article FOURTH which grant  the Board the
            authority to construe and apply the  provisions  of that Article and
            subsection  C.4  of  Article  FOURTH, to the extent it obligates any
            person  to  provide, or  authorizes the  Board  to demand,  complete
            information concerning  beneficial ownership of the Company's common
            stock; and

      (b)   Article  NINTH  which authorizes the Board to consider the effect of
            any offer to acquire  the  Company on   constituencies   other  than
            stockholders in evaluating any such offer.

      This opinion is rendered to you solely for your benefit in connection with
the  issuance of the Shares as described  above.  This opinion may not be relied
upon by any other person or for any other  purpose,  and it should not be quoted
in whole or in part or otherwise referred to or be furnished to any governmental
agency (other than the Securities and Exchange Commission in connection with the
aforementioned  Registration  Statement  on Form S-8 in which  this  opinion  is
contained) or any other person or entity  without the prior  written  consent of
this firm.

      We note that,  although certain portions of the Registration  Statement on
Form S-8 (the financial  statements and  schedules)  have been included  therein
(through  incorporation  by reference) on the authority of "experts"  within the
meaning of the Securities Act, we are not experts with respect to any portion of
the  Registration   Statement,   including  without   limitation  the  financial
statements  or schedules or the other  financial  information  or data  included
therein.

      We hereby  consent to the filing of this opinion as an exhibit to, and the
reference to this firm in, the Company's Registration Statement on Form S-8.


                                          Very truly yours,


                                          /s/ MULDOON MURPHY & FAUCETTE LLP

                                         MULDOON MURPHY & FAUCETTE LLP