Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders

Synovus Financial Corp.:

We consent to the incorporation by reference in the registration statements (No. 333‑143035, No. 333‑187464, No. 333‑187465, No. 333‑188254 and No. 333-227367) on Forms S‑8, and (No. 333‑233341 and No. 333-219862) on Forms S‑3 of Synovus Financial Corp. of our reports dated March 2, 2020, with respect to the consolidated balance sheets of Synovus Financial Corp. and subsidiaries as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, changes in shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2019, and the related notes, and the effectiveness of internal control over financial reporting as of December 31, 2019, which reports appear in the December 31, 2019 annual report on Form 10‑K of Synovus Financial Corp.

/s/ KPMG LLP

Atlanta, Georgia

March 2, 2020