EFSC Enterprise Financial Services Corporation

Enterprise Bank & Trust, the banking subsidiary of Enterprise Financial Services Corp (Nasdaq:EFSC), announced that it has agreed to purchase certain assets and assume the liability for certain deposits of the BankLiberty branch at 11401 Olive Boulevard in Creve Coeur, MO. Enterprise intends to operate the location as a full-service branch of Enterprise Bank & Trust, subject to regulatory approval, beginning in the fourth quarter of 2011.

The Olive Boulevard location will be Enterprise's fifth branch in the St. Louis metropolitan area. The Bank's other St. Louis-area branches are located in Clayton, Sunset Hills, St. Peters and St. Charles. Enterprise also operates seven branches in the Kansas City area and four in the Phoenix market.

Enterprise Financial operates commercial banking and wealth management businesses in metropolitan St. Louis, Kansas City and Phoenix. Enterprise is primarily focused on serving the needs of privately held businesses, their owner families, executives and professionals. 

Readers should note that in addition to the historical information contained herein, this press release contains forward-looking statements, which are inherently subject to risks and uncertainties that could cause actual results to differ materially from those contemplated from such statements. We use the words "expect" and "intend" and variations of such words and similar expressions in this communication to identify such forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, burdens imposed by federal and state regulations of banks, credit risk, exposure to local and national economic conditions, risks associated with rapid increase or decrease in prevailing interest rates, effects of mergers and acquisitions, effects of critical accounting policies and judgments, legal and regulatory developments and competition from banks and other financial institutions, as well as other risk factors described in Enterprise Financial's 2010 Annual Report on Form 10-K. Forward-looking statements speak only as of the date they are made, and the Company undertakes no obligation to update them in light of new information or future events.

CONTACT: Jerry Mueller
         Senior Vice President
         (314) 512-7251
         Ann Marie Mayuga
         AMM Communications
         (314) 485-9499