EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Board of Directors and Shareholders
Mercantile Bank Corporation
Grand Rapids, MI
We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Registration No. 333-248512) and Form S-8 (Registration Nos. 333-91434, 333-117763, 333-138328, 333-152254, 333-170026, 333-197072, 333-238858, and 333-288013) of Mercantile Bank Corporation of our reports dated February 27, 2026 relating to the consolidated financial statements and the effectiveness of Mercantile Bank Corporation’s internal control over financial reporting, which appears on Form 10-K.
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/s/ Plante & Moran, PLLC |
Plante & Moran, PLLC
Grand Rapids, Michigan