EXHIBIT 24.1

POWER OF ATTORNEY

The undersigned members of the Board of Directors and Executive Officers of Enterprise Financial Services Corp, a Delaware corporation (the “Company”) hereby appoint Frank H. Sanfilippo or Kevin C. Eichner as their Attorney-in-Fact for the purpose of signing the Company’s Securities Exchange Commission Form 10-K (and any and all Amendments thereto) for the year ended December 31, 2006.

Dated: January 31, 2007
Signatures	Title
/s/ Peter F. Benoist	Executive Vice President and Chairman of the Board of Directors
Peter F. Benoist
/s/ James J. Murphy	Lead Director
James Murphy
/s/ Kevin C. Eichner	Chief Executive Officer and Director
Kevin C. Eichner
/s/ Paul R. Cahn	Director
Paul R. Cahn
/s/ William H. Downey	Director
William H. Downey
/s/ Lewis A. Levey	Director
Lewis A. Levey.
/s/ Robert E. Guest, Jr.	Director
Robert E. Guest, Jr.
/s/ Richard S. Masinton	Director
Richard S. Masinton
/s/ Birch M. Mullins	Director
Birch M. Mullins
/s/ Robert E. Saur	Director
Robert E. Saur
/s/ Sandra Van Trease	Director
Sandra Van Trease
/s/ Henry D. Warshaw	Director
Henry D. Warshaw