Cornerstone State Bank
Montgomery, MN · Owner: Cornerstone Bcorp Inc
$247M
total assets, June 30, 2026
$247M
total assets, June 30, 2026
Cornerstone State Bank is a state nonmember bank based in Montgomery, MN, owned by Cornerstone Bcorp Inc. As of June 30, 2026 it held $247.0 million in assets and $223.9 million in deposits; assets were up 4.9% from a year before. It has 7 branches.
Updated Oct 11, 2026 · numbers as of June 30, 2026
Total assets
$247M
+4.9% in a year · +1.6% in a quarter
Deposits
$224M
+4.7% in a year · +1.1% in a quarter
Loans
$152M
+3.8% in a year · -2.2% in a quarter
Profit so far
$1.8M
Jan 1 to Jun 30, 2026 · +222.2% in a year
Capital ratio
10.60%
+0.53 pts in a year
Return on assets
1.49%
+1.01 pts in a year
Facts
- Type
- State nonmember bank
- Head office
- 401 4th St Nw, Montgomery, MN, 56069
- County
- Le Sueur
- Holding company
- Cornerstone Bcorp Inc
- Established
- Apr 8, 1974
- Employees
- 40
- Branches
- 7
- Website
- www.cornerstonestatebank.com
- Id
- b21525
Quarter by quarter
March 31, 1984 to June 30, 2026
Assets, deposits and loans
Each quarter end, US dollars
Profit by quarter
Net income of each quarter, the last 12
Ratios
Percent. Return on assets and net interest margin are yearly rates.
Branches
7 offices as of June 30, 2026, holding $223.9 million in deposits
Branch map
Every branch, sized by its deposits
| State | Branches | Deposits | Share |
|---|---|---|---|
| Minnesota | 7 | $224M | 100.0% |
| Largest branches | Place | Deposits |
|---|---|---|
| Le Sueur Branch | Le Sueur, MN | $54.6M |
| Belle Plaine Branch | Belle Plaine, MN | $44.6M |
| Green Isle Branch | Green Isle, MN | $37.3M |
| Cornerstone State Bank (main office) | Montgomery, MN | $31.1M |
| Madison Lake Branch | Madison Lake, MN | $25.5M |
| 1516 Cloquet Avenue Branch | Cloquet, MN | $19.6M |
| Eagle Lake Branch | Eagle Lake, MN | $11.3M |
Related pages
Questions and answers
How big is Cornerstone State Bank?
$247.0 million in total assets and $223.9 million in deposits as of June 30, 2026, with assets up 4.9% from a year before. Its loans were $152.4 million.
How many branches does Cornerstone State Bank have?
7 branches in Minnesota as of June 30, 2026.
Is Cornerstone State Bank profitable?
Yes: it earned $1.82 million from January 1 to June 30, 2026 (up 222.2% from the same months a year before). Its return on assets was 1.49% a year; about 1% is typical.
Who owns Cornerstone State Bank?
Cornerstone State Bank is owned by Cornerstone Bcorp Inc, its holding company.
Official public data from the reports every insured bank files each quarter. Profit so far runs from January 1 to the quarter end. Branch deposits are counted once a year, as of June 30. New quarters appear about two months after the quarter ends.