Exhibit 99.1

For more information contact:
Kevin Eichner or Frank Sanfilippo (314) 725 5500
Melissa Sturges (816) 221 7500 or Ann Marie Mayuga (314) 469 4798

 ENTERPRISE FINANCIAL REPORTS 16% INCREASE IN
SECOND QUARTER NET INCOME

• Year-to-date net income up 11% over same period of ‘06
• Fully diluted EPS up 38% from first quarter 2007, level with same quarter of ‘06
• Loans up 35% from previous year, deposits up 33%

St. Louis, July 17, 2007. Enterprise Financial Services Corp (NASDAQ: EFSC), the parent company of Enterprise Bank & Trust, announced today that second quarter net income rose from $3.9 million reported in the second quarter of 2006 to $4.5 million – an increase of 16%. Earnings per share were $0.36, level with the same period in 2006 and up 38% from first quarter of 2007. Total common shares outstanding at June 30, 2006 were 10,508,000 vs. 12,354,000 at June 30, 2007, as the company issued nearly two million additional shares during the past year related to the acquisitions of NorthStar (July ‘06) and Great American (February ‘07) banks in the Kansas City market.

Commenting on the quarter and year-to-date results, EFSC President and CEO, Kevin C. Eichner, said, “We continue to digest our most recent bank acquisitions. Noninterest expenses are up by 33% from the prior year due primarily to our NorthStar and Great American additions. At the same time, we have had to contend with the contraction in net interest margins which has characterized our industry of late. As indicated in our first quarter earnings release, we had planned earnings per share to be flat for the first half of 2007 compared to 2006, but the margin and expense factors as well as weaker than planned wealth management revenue and lower net loan growth caused us to miss our six-month target by $0.02 per share.”

Continuing, Eichner said, “Excluding Great American, our bankers generated a record $297 million in gross loan fundings in the first six months of 2007, only to see pay-offs offset all but $21 million of that number as competitors offered fixed rate pricing we chose not to meet. Now that the yield curve has finally shifted, we may have reason to expect that such fixed rate refinancing pressures will ease some during the remainder of 2007, again putting our organic loan growth targets more within reach.”

Banking Line of Business

Including Great American, net interest income increased $3.5 million, or 30% in the second quarter of 2007 versus the same quarter in 2006. At quarter end, portfolio loans were up $189 million from year-end and $392 million, or 35%, from one year ago.

Total deposits grew $113 million from December 31, 2006 and $352 million, or 33%, from the same period one year ago. The deposit mix for the second quarter remained favorable as non-interest bearing DDA deposits represented 15% of average deposits and brokered deposits represented just 10% of total deposits. Treasury management pipelines remain strong and we expect our typical seasonal increases in deposits as we move through the second half of the year.

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The tax-equivalent net interest rate margin for the second quarter was 3.81%, a decrease of 5 basis points from the first quarter of 2007. Adjusting for the temporary margin impact of our non-performing loans, the rate margin appears to be stabilizing as a result of the Company’s disciplined loan pricing, our ability to manage deposit costs more in line with short term interest rate trends, and the declining impact of maturing certificates of deposit.

Nonperforming loans totaled $12.7 million or 0.84% of total loans versus 0.66% at March 31, 2007. We expect $3.3 million of the nonperforming loans to pay off in the third quarter based on sales activity on two of these loans. Bank management does not expect to incur significant losses on the balance of non-performing loans. Of the total nonperforming loans, $10.2 million relate to four relationships, three of which are residential home builders in St. Louis and Kansas City and one commercial property in Kansas City.

The company’s net charge-offs during the quarter were $232,000 or 0.06% annualized. For the first half of 2007, net charge-offs were $860,000 or 0.13% annualized. For the quarter, the provision for loan losses was $715,000 versus $737,000 in the same quarter of 2006. Higher nonperforming loan levels and slower net loan growth drove the provision levels in the current quarter.

The Company’s allowance for loan losses represented 1.31% of portfolio loans at June 30, 2007, which is consistent with levels at year end 2006 and one year ago.

Increases in Deposit Service Charges and Other Income for the second quarter, versus the same quarter in 2006, are largely related to the acquisitions of NorthStar and Great American along with organic growth in deposit products and related services, including our new International Banking Division. The gain on the sale of a holding company investment represents $268,000 of the increase. Gains on sale of mortgage loans were higher in 2007 due to favorable market conditions for refinancing and the impact of a major expansion of our Kansas City mortgage operations.

Wealth Management Line of Business

For the second quarter of 2007, Wealth Management revenue increased $227,000 or 7% from the same quarter in 2006.

Enterprise Trust revenues grew 8% with pre-tax earnings essentially flat in comparison with the same quarter in 2006. For the six months ended June 30, 2007, pre-tax earnings for Enterprise Trust are up 7% over 2006. Total assets under administration now exceed $1.7 billion, up 13% over the prior year period. The Trust operation has been heavily engaged in re-structuring and re-staffing related to preparation for our new national trust charter, which is expected this year. The unit expects to roll out some new pricing strategies and new service lines later this year in conjunction with the new charter.

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After amortization of intangibles, the cost of related debt, and minority interest, Millennium posted pre-tax earnings of $403,000 in the second quarter versus $668,000 in the same quarter of 2006. For the six months ended June 30, 2007, pre-tax earnings were $175,000 versus $961,000 in the same period last year. Although paid premiums were up 12% compared to year-to-date 2006, both revenue growth and margin have been lower. A shift in carrier mix (more business has been placed with certain carriers whose contractual payouts to Millennium are lower), higher payouts from Millennium to its retail level producers, and an increase in operating expenses have been the principal factors affecting the unit’s performance in the first half of this year.

Other Business Results

For the quarter, the Company’s efficiency ratio improved from 67% in the first quarter to 62%. Non-interest expenses were $12.4 million in the second quarter of 2007 versus $9.3 million in the same quarter of 2006, an increase of $3.1 million or 33%. In addition to increased expenses at Millennium, approximately $841,000 of this increase is due to incremental expenses related to the NorthStar acquisition and $825,000 due to incremental expenses related to Great American. The Company also added new talent and infrastructure to support its expansion in International Banking, Wholesale Banking, Wealth Management and Treasury Management. We have been particularly pleased with several new high level bankers recruited to our Kansas City team as we deploy to our broadened platform there.

Summarizing the year to date and the Company’s outlook, Eichner noted, “We have invested in a substantially enhanced operating platform to support future growth which has resulted in a 65% increase in shareholders’ equity, a 35% increase in portfolio loans, a 33% increase in deposits, and an 11% increase in noninterest income in the past twelve months. We remain committed to our position as a growth company in this environment despite the obvious challenges. Achievement of our earnings plan for the year depends on stronger net loan growth, a reduction in nonperforming loans, improvement in our net interest margin and accelerated wealth management revenue growth. Given this team’s historical performance, we have reason to be confident in our ability to execute against these imperatives.”

Enterprise Financial operates commercial banking and wealth management businesses mostly in metropolitan St. Louis and Kansas City, with a primary focus on serving the needs of privately held businesses, their owners and other success-minded individuals.

Please refer to the Consolidated Financial Summary attached for more details.

# # #

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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. 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 2006 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.

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ENTERPRISE FINANCIAL SERVICES CORP
CONSOLIDATED FINANCIAL SUMMARY
(unaudited)

(In thousands, except per share data)	For the Quarter Ended				For the Six Months Ended
	Jun 30,		Jun 30,		Jun 30,		Jun 30,
INCOME STATEMENTS	2007		2006		2007		2006
Total interest income	$	30,946	$	21,659	$	58,796	$	41,088
Total interest expense		15,821		9,517		29,750		17,689
Net interest income		15,125		12,142		29,046		23,399
Provision for loan loss		715		737		1,565		1,537
Net interest income after provision for loan losses		14,410		11,405		27,481		21,862
NONINTEREST INCOME
Wealth Management revenue		3,458		3,231		6,421		6,549
Deposit service charges		804		532		1,463		1,033
Gain on sale of mortgage loans		129		48		195		71
Loss on sale of other real estate		(8)		-		(12)		-
Other income		523		141		736		276
Total noninterest income		4,906		3,952		8,803		7,929
NONINTEREST EXPENSE
Salaries and benefits		7,141		5,843		14,449		11,643
Occupancy		1,025		608		1,903		1,219
Furniture and equipment		370		239		686		490
Other		3,834		2,630		7,193		5,262
Total noninterest expense		12,370		9,320		24,231		18,614
Minority interest in net income of consolidated subsidiary		157		60		-		(393)
Income before income tax		7,103		6,097		12,053		10,784
Income taxes		2,588		2,196		4,380		3,885
Net income	$	4,515	$	3,901	$	7,673	$	6,899
Basic earnings per share	$	0.37	$	0.37	$	0.63	$	0.66
Diluted earnings per share	$	0.36	$	0.36	$	0.62	$	0.64
Return on average assets		1.03%		1.23%		0.92%		1.11%
Return on average equity		11.20%		16.00%		10.14%		14.48%
Efficiency ratio		61.75%		57.91%		64.02%		59.42%
Noninterest expense to average assets		2.83%		2.93%		2.91%		2.99%
YIELDS (fully tax equivalent)
Loans		7.98%		7.65%		7.96%		7.44%
Securities		4.50%		4.00%		4.40%		3.95%
Federal funds sold		5.49%		5.28%		5.47%		4.64%
Yield on earning assets		7.72%		7.29%		7.69%		7.06%
Interest bearing deposits		4.47%		3.71%		4.45%		3.55%
Subordinated debt		7.19%		7.08%		7.20%		6.96%
Borrowed Funds		5.04%		4.85%		5.02%		4.70%
Cost of paying liabilities		4.63%		3.93%		4.59%		3.74%
Net interest spread		3.09%		3.36%		3.10%		3.32%
Net interest rate margin		3.81%		4.11%		3.83%		4.05%

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ENTERPRISE FINANCIAL SERVICES CORP
CONSOLIDATED FINANCIAL SUMMARY (cont.)
(unaudited)

(In thousands)
	Jun 30,		Mar 31,		Dec 31,		Sep 30,		Jun 30,
BALANCE SHEETS	2007		2007		2006		2006		2006
ASSETS
Cash and due from banks	$	45,081	$	41,846	$	41,558	$	53,113	$	48,663
Federal funds sold		2,059		6,992		7,066		6,959		3,034
Interest-bearing deposits		1,021		1,144		1,669		2,614		2,007
Debt and equity investments		111,617		119,056		111,210		114,860		109,449
Loans held for sale		3,840		4,650		2,602		5,268		3,028
Portfolio loans		1,500,512		1,492,460		1,311,723		1,269,391		1,108,906
Less allowance for loan losses		19,703		19,220		16,988		17,805		14,449
Net loans		1,480,809		1,473,240		1,294,735		1,251,586		1,094,457
Premises and equipment, net		22,801		22,777		17,050		15,295		13,941
Other real estate		441		1,064		1,500		1,182		-
Goodwill		54,841		55,284		29,983		29,804		12,004
Core deposit intangible		3,693		3,886		2,153		2,261		-
Other amortizing intangibles		3,180		3,408		3,636		3,864		4,092
Other assets		23,929		23,276		22,425		21,369		15,866
Total assets	$	1,753,312	$	1,756,623	$	1,535,587	$	1,508,175	$	1,306,541
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing deposits	$	215,771	$	214,965	$	234,849	$	222,668	$	195,719
Interest bearing deposits		1,212,353		1,231,139		1,080,659		1,059,282		879,995
Total deposits		1,428,124		1,446,104		1,315,508		1,281,950		1,075,714
Subordinated debentures		56,807		56,807		35,054		35,054		30,930
FHLB advances		88,192		75,387		26,995		38,162		88,653
Other borrowings		7,593		12,786		13,757		13,731		4,810
Other liabilities		9,527		6,837		11,279		11,113		7,237
Total liabilities		1,590,243		1,597,921		1,402,593		1,380,010		1,207,344
Shareholders' equity		163,069		158,702		132,994		128,165		99,197
Total liabilities and shareholders' equity	$	1,753,312	$	1,756,623	$	1,535,587	$	1,508,175	$	1,306,541

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ENTERPRISE FINANCIAL SERVICES CORP
CONSOLIDATED FINANCIAL SUMMARY (cont.)
(unaudited)

(In thousands, except per share data)	For the Quarter Ended
	Jun 30,		Mar 31,		Dec 31,		Sep 30,		Jun 30,
	2007		2007		2006		2006		2006
EARNINGS SUMMARY
Net interest income	$	15,125	$	13,921	$	14,039	$	13,839	$	12,142
Provision for loan losses		715		850		350		240		737
Wealth Mangement revenue		3,458		2,963		3,791		3,468		3,231
Noninterest income		1,448		934		871		857		721
Noninterest expense		12,370		11,861		11,828		10,952		9,320
Minority interest in net income of consolidated subsidiary		157		(157)		(48)		(434)		60
Income before income tax		7,103		4,950		6,475		6,538		6,097
Net income		4,515		3,158		4,391		4,182		3,901
Diluted earnings per share	$	0.36	$	0.26	$	0.37	$	0.35	$	0.36
Return on average equity		11.20%		8.92%		13.24%		12.99%		16.00%
Net interest rate margin (fully tax equivalized)		3.81%		3.86%		3.98%		3.99%		4.11%
Efficiency ratio		61.75%		66.57%		63.25%		60.30%		57.91%
MARKET DATA
Book value per share	$	13.20	$	12.86	$	11.52	$	11.19	$	9.44
Tangible book value per share	$	8.20	$	8.03	$	8.42	$	8.05	$	7.91
Market value per share	$	24.86	$	28.00	$	32.58	$	30.86	$	25.45
Period end common shares		12,354		12,340		11,540		11,452		10,508
Average basic common shares		12,346		11,835		11,491		11,397		10,490
Average diluted common shares		12,692		12,198		11,892		11,823		10,876
ASSET QUALITY
Net charge-offs (recoveries)	$	232	$	628	$	1,167	$	(46)	$	251
Nonperforming loans	$	12,661	$	9,855	$	6,363	$	6,214	$	893
Nonperforming loans to total loans		0.84%		0.66%		0.49%		0.49%		0.08%
Allowance for loan losses to total loans		1.31%		1.29%		1.30%		1.40%		1.30%
Net charge-offs (recoveries) to average loans (annualized)		0.06%		0.19%		0.37%		(0.01%)		0.09%
CAPITAL
Average equity to average assets		9.22%		8.96%		8.65%		8.49%		7.66%
Tier 1 capital to risk-weighted assets		9.82%		9.50%		9.63%		9.54%		9.87%
Total capital to risk-weighted assets		11.09%		10.85%		10.87%		10.79%		11.11%
Tangible equity to tangible assets		5.99%		5.67%		6.48%		6.26%		6.44%
AVERAGE BALANCES
Portfolio loans	$	1,492,573	$	1,365,340	$	1,265,000	$	1,257,394	$	1,079,063
Earning assets		1,622,139		1,487,193		1,426,341		1,400,706		1,202,676
Total assets		1,754,297		1,601,266		1,521,640		1,504,253		1,276,878
Deposits		1,426,002		1,327,177		1,301,686		1,262,544		1,044,498
Shareholders' equity		161,663		143,514		131,621		127,685		97,786
LOAN PORTFOLIO
Commercial and industrial	$	391,237	$	379,147	$	352,914	$	343,776	$	323,109
Commercial real estate		681,735		671,709		576,172		553,486		438,684
Construction real estate		247,722		251,184		196,851		185,743		162,589
Residential real estate		149,182		157,473		150,244		148,369		148,650
Consumer and other		30,636		32,947		35,542		38,017		35,874
Total loan portfolio	$	1,500,512	$	1,492,460	$	1,311,723	$	1,269,391	$	1,108,906
DEPOSIT PORTFOLIO
Noninterest-bearing accounts	$	215,771	$	214,965	$	234,849	$	222,668	$	195,719
Interest-bearing transaction accounts		128,808		123,848		111,725		101,262		99,887
Money market and savings accounts		552,678		582,231		556,947		507,407		471,526
Certificates of deposit		530,867		525,060		411,987		450,613		308,582
Total deposit portfolio	$	1,428,124	$	1,446,104	$	1,315,508	$	1,281,950	$	1,075,714

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ENTERPRISE FINANCIAL SERVICES CORP
CONSOLIDATED FINANCIAL SUMMARY (cont.)
(unaudited)

(In thousands)	For the Quarter Ended
	Jun 30,		Mar 31,		Dec 31,		Sep 30,		Jun 30,
	2007		2007		2006		2006		2006
YIELDS (fully tax equivalent)
Loans		7.98%		7.94%		7.95%		7.90%		7.65%
Securities		4.50%		4.31%		4.21%		4.11%		4.00%
Federal funds sold		5.49%		5.51%		5.43%		5.29%		5.28%
Yield on earning assets		7.72%		7.66%		7.57%		7.54%		7.29%
Interest bearing deposits		4.47%		4.42%		4.32%		4.17%		3.71%
Borrowed funds		5.04%		4.99%		4.61%		5.04%		4.85%
Subordinated debt		7.19%		7.21%		7.37%		7.31%		7.08%
Cost of paying liabilities		4.63%		4.55%		4.42%		4.31%		3.93%
Net interest spread		3.09%		3.11%		3.15%		3.23%		3.36%
Net interest rate margin		3.81%		3.86%		3.98%		3.99%		4.11%
WEALTH MANAGEMENT
Trust Assets under management	$	1,111,042	$	1,047,700	$	1,042,146	$	996,142	$	983,365
Trust Assets under administration		1,742,426		1,659,573		1,634,834		1,567,164		1,536,437

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