Banks in St. Clair County, Illinois

FDIC-insured institutions in St. Clair County held $5.9 billion in deposits as of June 30, 2026, according to the FDIC.

26 FDIC-insured institutions held $5.9 billion in deposits in 68 offices in St. Clair County at June 30, 2026; Regions Bank held the most, 14.2% of the county's.

St. Clair County, June 30, 2026

$5.9 billion
Deposits in the county: $5,946,158,000; At June 30, 2026, against $5.8 billion a year before, each year's own dollars.; 26
Institutions with deposits: FDIC-insured banks and savings institutions with an office here that reported deposits.; 68
Offices: Every office the survey lists here, against 67 in 2025.; 14.2%
The largest share: Regions Bank, with $842.8 million in 12 offices.

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FDIC-insured institutions with an office in St. Clair County, Illinois, by deposits there at June 30, 2026, each with its share of the county's $5.9 billion
Rank	Institution	Offices	Deposits	Share	Deposits, 2025
1	Regions Bank	12	$842.8 million	14.2%	$848.3 million
2	Associated Bank, National Association	3	$498.0 million	8.4%	$468.9 million
3	Busey Bank	3	$475.2 million	8.0%	$436.9 million
4	Carrollton Bank	1	$459.1 million	7.7%	$447.5 million
5	Citizens Community Bank	4	$446.1 million	7.5%	$417.7 million
6	Bank of America, National Association	2	$412.9 million	6.9%	$422.0 million
7	FCB Banks	4	$383.6 million	6.5%	$367.8 million
8	Bank of Belleville	1	$345.7 million	5.8%	$352.3 million
9	Bank of O'Fallon	2	$324.1 million	5.5%	$319.7 million
10	First National Bank of Waterloo	8	$283.5 million	4.8%	$276.6 million
11	Commerce Bank	2	$243.8 million	4.1%	$246.8 million
12	U.S. Bank National Association	4	$207.2 million	3.5%	$205.7 million
13	First Bank	3	$168.0 million	2.8%	$189.1 million
14	First FSB of Mascoutah	2	$159.3 million	2.7%	$153.2 million
15	Bank of Springfield	2	$134.2 million	2.3%	$109.6 million
16	The Central Trust Bank	2	$117.2 million	2.0%	$116.4 million
17	PNC Bank, National Association	1	$61.5 million	1.0%	$63.6 million
18	First Mid Bank & Trust, National Association	1	$59.2 million	1.0%	$63.0 million
19	Heartland Bank and Trust Company	1	$55.2 million	0.9%	$61.5 million
20	JPMorgan Chase Bank, National Association	2	$55.0 million	0.9%	$34.1 million
21	UMB Bank, National Association	1	$55.0 million	0.9%	$55.4 million
22	Midland States Bank	1	$52.6 million	0.9%	$48.8 million
23	BMO Bank National Association	1	$49.6 million	0.8%	$57.3 million
24	The Farmers and Merchants National Bank of Nashville	3	$27.4 million	0.5%	$25.9 million
25	Lindell Bank & Trust Company	1	$25.9 million	0.4%	$32.3 million
26	Woodforest National Bank	1	$4.1 million	0.1%	$4.2 million

An institution with no office in the county in 2025 shows none for that year; a name is the survey’s for 2026, and one without a link has no page because it did not file a Call Report for the newest quarter.

Sources

FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey — Federal Deposit Insurance Corporation · Public domain — U.S. Government work · retrieved September 27, 2026

Compiled automatically from FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 30, 2026

St. Clair County, June 30, 2026

Each institution’s share of the county’s deposits

Sources