Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Synovus Financial Corp.:

We consent to the use of our reports dated March 1, 2021, with respect to the consolidated financial statements of Synovus Financial Corp. and subsidiaries, and the effectiveness of internal control over financial reporting, incorporated herein by reference.

/s/ KPMG LLP

Atlanta, Georgia

May 17, 2021