NSB Bank
Mason City, IA · Owner: Northwood Finl Services Corp
$461M
total assets, June 30, 2026
$461M
total assets, June 30, 2026
NSB Bank is a state nonmember bank based in Mason City, IA, owned by Northwood Finl Services Corp. As of June 30, 2026 it held $460.8 million in assets and $400.6 million in deposits; assets were down 2.1% from a year before. It has 6 branches.
Updated Oct 11, 2026 · numbers as of June 30, 2026
Total assets
$461M
-2.1% in a year · -3.8% in a quarter
Deposits
$401M
-1.1% in a year · -3.5% in a quarter
Loans
$334M
-1.2% in a year · -1.7% in a quarter
Profit so far
$2.2M
Jan 1 to Jun 30, 2026 · -20.8% in a year
Capital ratio
8.49%
+0.11 pts in a year
Return on assets
0.92%
-0.25 pts in a year
Facts
- Type
- State nonmember bank
- Head office
- 2650 4th St Sw, Mason City, IA, 50401
- County
- Cerro Gordo
- Holding company
- Northwood Finl Services Corp
- Established
- Jan 1, 1933
- Employees
- 49
- Branches
- 6
- Website
- www.nsbbank.com
- Id
- b8094
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
6 offices as of June 30, 2026, holding $400.6 million in deposits
Branch map
Every branch, sized by its deposits
| State | Branches | Deposits | Share |
|---|---|---|---|
| Iowa | 6 | $401M | 100.0% |
| Largest branches | Place | Deposits |
|---|---|---|
| Northwood Branch | Northwood, IA | $132M |
| Nsb Bank (main office) | Mason City, IA | $82.9M |
| Forest City Branch | Forest City, IA | $75.8M |
| Titonka Branch | Titonka, IA | $62.4M |
| Thompson Branch | Thompson, IA | $25.7M |
| Regency Branch | Mason City, IA | $22.3M |
Related pages
Questions and answers
How big is NSB Bank?
$460.8 million in total assets and $400.6 million in deposits as of June 30, 2026, with assets down 2.1% from a year before. Its loans were $333.7 million.
How many branches does NSB Bank have?
6 branches in Iowa as of June 30, 2026.
Is NSB Bank profitable?
Yes: it earned $2.17 million from January 1 to June 30, 2026 (down 20.8% from the same months a year before). Its return on assets was 0.92% a year; about 1% is typical.
Who owns NSB Bank?
NSB Bank is owned by Northwood Finl Services Corp, 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.