FDIC-insured bank
Cornerstone State Bank — Montgomery, MN
Bank headquartered in Montgomery, Minnesota, part of CORNERSTONE BCORP INC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 401 4th St Nw Montgomery, MN 56069 |
| County | Le Sueur |
| Metro area | Minneapolis-St. Paul-Bloomington, MN-WI |
| Website | WWW.CORNERSTONESTATEBANK.COM |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 21525 |
| Federal Reserve RSSD ID | 914853 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | CORNERSTONE BCORP INC |
| Domestic offices | 7 |
| Financials as of | June 30, 2026 |
How to find your Cornerstone State Bank routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at WWW.CORNERSTONESTATEBANK.COM.
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Offices nearest to headquarters
| Cornerstone State Bank main office Montgomery, MN |
401 4th St Nw, 56069 |
| Belle Plaine Branch Belle Plaine, MN |
406 E Poplar St, 56011 |
| Le Sueur Branch Le Sueur, MN |
415 N Main St, 56058 |
| Madison Lake Branch Madison Lake, MN |
500 Main St, 56063 |
| Eagle Lake Branch Eagle Lake, MN |
600 Parkway Ave, 56024 |
| Green Isle Branch Green Isle, MN |
451 3rd St, 55338 |
| 1516 Cloquet Avenue Branch Cloquet, MN |
1516 Cloquet Ave, 55720 |
Where Cornerstone State Bank has offices
Cities with the most Cornerstone State Bank offices
Largest banks headquartered elsewhere in Minnesota
| Ameriprise Bank, FSB Minneapolis | $25.48 billion |
| Bridgewater Bank Saint Louis Park | $5.38 billion |
| Frandsen Bank & Trust Lonsdale | $3.66 billion |
| Stearns Bank National Association Saint Cloud | $3.27 billion |
| Minnwest Bank Redwood Falls | $2.94 billion |
| Merchants Bank, National Association Winona | $2.88 billion |
| Tradition Capital Bank Wayzata | $2.72 billion |
| Think Mutual Bank Rochester | $2.23 billion |
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