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Cornerstone State Bank
✓ FDIC-insured · Active FDIC Certificate #21525
Cornerstone State Bank is an FDIC-insured state-chartered bank that is not a Federal Reserve member (supervised by the FDIC), headquartered in Montgomery, Minnesota, established in 1974. As of the 06/30/2026 FDIC call report, it reported $247M in total assets and $224M in deposits. FDIC location data lists 7 offices in Minnesota. The FDIC classifies it as a community bank. It is owned by the holding company CORNERSTONE BCORP INC (Le Sueur, MN).
Financial data as of the 06/30/2026 FDIC call report.
Where it operates
All 7 of Cornerstone State Bank's FDIC-listed offices are in Minnesota. Browse banks in Montgomery for other local options.
Branch locations
| Cornerstone State Bank Madison Lake Branch · Full Service - Brick And Mortar | 500 Main St Madison Lake, MN 56063 Map ↗ |
| Cornerstone State Bank Cornerstone State Bank · Full Service - Brick And Mortar | 401 4th St Nw Montgomery, MN 56069 Map ↗ |
| Cornerstone State Bank Eagle Lake Branch · Full Service - Brick And Mortar | 600 Parkway Ave Eagle Lake, MN 56024 Map ↗ |
| Cornerstone State Bank Green Isle Branch · Full Service - Brick And Mortar | 451 3rd St Green Isle, MN 55338 Map ↗ |
| Cornerstone State Bank 1516 Cloquet Avenue Branch · Full Service - Brick And Mortar | 1516 Cloquet Ave Cloquet, MN 55720 Map ↗ |
| Cornerstone State Bank Le Sueur Branch · Full Service - Brick And Mortar | 415 N Main St Le Sueur, MN 56058 Map ↗ |
| Cornerstone State Bank Belle Plaine Branch · Full Service - Brick And Mortar | 406 E Poplar St Belle Plaine, MN 56011 Map ↗ |
Holding company: CORNERSTONE BCORP INC
The FDIC lists CORNERSTONE BCORP INC, based in Le Sueur, MN, as the top holding company for Cornerstone State Bank. The FDIC shows no other active insured banks under the same holding company.
Similar-size banks in Minnesota
Active FDIC-insured banks headquartered in Minnesota with total assets closest to Cornerstone State Bank's $247M. See all banks in Minnesota.
| Bank | HQ city | Assets | Offices |
|---|---|---|---|
| First Bank Elk River | Elk River | $369M | 4 |
| ProGrowth Bank | Nicollet | $365M | 4 |
| Heritage Bank National Association | Spicer | $361M | 4 |
| United Community Bank | Perham | $359M | 3 |
| Harvest Bank | Kimball | $355M | 6 |
| Granite Bank | Cold Spring | $353M | 2 |
| Sherburne Bank | Becker | $351M | 4 |
| Farmers and Merchants State Bank of Pierz | Pierz | $336M | 3 |
Cornerstone State Bank: common questions
Is Cornerstone State Bank FDIC-insured?
Yes. Cornerstone State Bank is an active FDIC-insured institution, FDIC Certificate #21525. Deposits are insured up to $250,000 per depositor, per ownership category. You can confirm this on FDIC BankFind.
Where is Cornerstone State Bank headquartered?
Cornerstone State Bank is headquartered at 401 4th St Nw, Montgomery, MN 56069, according to FDIC records.
How many branches does Cornerstone State Bank have?
FDIC location data lists 7 offices for Cornerstone State Bank, all in Minnesota.
Who owns Cornerstone State Bank?
The FDIC lists CORNERSTONE BCORP INC of Le Sueur, MN as the top holding company for Cornerstone State Bank.
Source: FDIC BankFind Suite (institution, location, and call report data). BankNearMe.com does not rank or rate banks.