EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Enterprise Financial Services Corp:

We consent to the incorporation by reference in the registration statements (Nos. 333-156771, 333-165551, 333-160032, 333-176883) on Form S-3 and (Nos. 333-152985, 333-148328, 333-136230, 333-82087, 333-100928) on Form S-8 of Enterprise Financial Services Corp and subsidiaries (the Company) of our report dated March 12, 2010, with respect to the consolidated balance sheet of the Company as of December 31, 2009, and the related consolidated statements of operations, shareholders' equity and comprehensive (loss) income, and cash flows for each of the years in the two-year period ended December 31, 2009, which report appears in the December 31, 2010 annual report on Form 10-K/A of the Company.

/s/ KPMG LLP

St. Louis, Missouri

April 23, 2012