Exhibit 5

LUSE GORMAN, PC

ATTORNEYS AT LAW

5335 WISCONSIN AVENUE, N.W., SUITE 780

WASHINGTON, D.C. 20015

TELEPHONE (202) 274-2000

FACSIMILE (202) 362-2902

www.luselaw.com

November 30, 2022

Board of Directors

IF Bancorp, Inc.

201 East Cherry Street

Watseka, Illinois 60970

Ladies and Gentlemen:

You have requested the opinion of this firm as to certain matters in connection with the registration of 264,850 shares of common stock, $0.01 par value per share (the “Shares”), of IF Bancorp, Inc. (the “Company”) to be issued pursuant to the IF Bancorp, Inc. 2022 Equity Incentive Plan (the “Equity Plan”).

In rendering the opinion expressed herein, we have reviewed the Articles of Incorporation and Bylaws of the Company, the Equity Plan, the Company’s Registration Statement on Form S-8 (the “Form S-8”), as well as resolutions of the board of directors of the Company and applicable statutes and regulations governing the Company.  We have assumed the authenticity, accuracy and completeness of all documents in connection with the opinion expressed herein.  We have also assumed the legal capacity and genuineness of the signatures of persons signing all documents in connection with which the opinions expressed herein are rendered. This opinion is limited to matters of Maryland corporate law.

Based on the foregoing, we are of the following opinion:

Following the effectiveness of the Form S-8, the Shares of the Company, when issued in accordance with the terms and conditions of the Equity Plan, will be legally issued, fully paid and non-assessable.

This opinion has been prepared solely for the use of the Company in connection with the preparation and filing of the Form S-8, and shall not be used for any other purpose or relied upon by any other person without the prior express written consent of this firm.  We hereby consent to the use of this opinion in the Form S-8.  By giving such consent, we do not hereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended.