UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of
The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)
May 14, 2007

ENTERPRISE FINANCIAL SERVICES CORP
(Exact name of registrant as specified in its charter)

Delaware  001-15373  43-1706259 
(State or Other Jurisdiction  (Commission  (IRS Employer 
of Incorporation)  File Number)  Identification No.) 
  150 N. Meramec, St. Louis, Missouri  63105   
(Address of principal executive offices)  (Zip Code) 

Registrant’s telephone number, including area code
(314) 725-5500
 
Not applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o      Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) 
o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) 
o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) 
o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) 



Item 5.02       Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers. 

     (b) On May 14, 2007, Paul R. Cahn tendered his resignation as a director of Enterprise Financial Services Corp (the “Company”) effective June 1, 2007.

     A copy of the press release regarding Mr. Cahn’s resignation is attached as Exhibit 99.1 to this report and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits

     99.1 Press Release of the Company dated May 15, 2007.


SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: May 15, 2007

ENTERPRISE FINANCIAL SERVICES CORP 
   
 
 
By:       /s/ Kevin C. Eichner   
       Kevin C. Eichner 
       Chief Executive Officer