Exhibit 23.(a)
Consent of Independent Registered Public Accounting Firm
Mercantile Bank Corporation
Grand Rapids, Michigan
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 of our reports dated March 7, 2016, relating to the consolidated financial statements and the effectiveness of Mercantile Bank Corporation’s internal control over financial reporting appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.
(Signed manually)
BDO USA, LLP
Grand Rapids, Michigan
June 6, 2016