Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the use in this Registration Statement on FormS-1 of Byline Bancorp, Inc. of our report dated April 7, 2017, except for the effects of there-incorporation and share exchange discussed in Note 26 – Subsequent Events to the consolidated financial statements, as to which the date is June 19, 2017, relating to the consolidated financial statements of Byline Bancorp, Inc. and Subsidiaries, and to the reference to our firm under the heading “Experts” in the Prospectus, which is part of this Registration Statement.
/s/ Moss Adams LLP
Portland, Oregon
June 19, 2017