Ottawa Savings Bancorp SB-2/A Registration of securities for small business issuer (amended)

Exhibit 23.4

[MCGLADREY & PULLEN LETTERHEAD]

Consent of Independent Registered Public Accounting Firm

We consent to the use in this Registration Statement of Ottawa Savings Bancorp, Inc. on Form SB-2 of our report on the consolidated financial statements of Ottawa Savings Bank and Subsidiary dated February 11, 2005, appearing in the Prospectus, which is a part of this Registration Statement.

We also consent to the reference to our firm under the caption “Experts” in such Prospectus.

/s/ McGladrey & Pullen, LLP

Champaign, Illinois

April 28, 2005