FDIC-insured bank
NSB Bank — Mason City, IA
Bank headquartered in Mason City, Iowa, part of NORTHWOOD FINL SERVICES CORP.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 2650 4th St Sw Mason City, IA 50401 |
| County | Cerro Gordo |
| Metro area | Mason City, IA |
| Website | www.nsbbank.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 8094 |
| Federal Reserve RSSD ID | 253646 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | NORTHWOOD FINL SERVICES CORP |
| Domestic offices | 6 |
| Financials as of | June 30, 2026 |
How to find your NSB 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.nsbbank.com.
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Offices nearest to headquarters
| Nsb Bank main office Mason City, IA |
2650 4th St Sw, 50401 |
| Regency Branch Mason City, IA |
451 S Illinois Ave, 50401 |
| Northwood Branch Northwood, IA |
900 Central Ave, 50459 |
| Forest City Branch Forest City, IA |
101 Highway 69 N, 50436 |
| Thompson Branch Thompson, IA |
11723 Highway 9, 50478 |
| Titonka Branch Titonka, IA |
173 Main St N, 50480 |
Where NSB Bank has offices
Cities with the most NSB Bank offices
Other banks headquartered in Mason City
| First Citizens Bank | $1.80 billion |
Largest banks headquartered elsewhere in Iowa
| Principal Bank Des Moines | $9.84 billion |
| Bankers Trust Company Des Moines | $7.83 billion |
| Hills Bank and Trust Company Hills | $4.79 billion |
| West Bank West Des Moines | $4.03 billion |
| Northwest Bank Spencer | $3 billion |
| Cedar Rapids Bank and Trust Company Cedar Rapids | $2.90 billion |
| Quad City Bank and Trust Company Bettendorf | $2.77 billion |
| Fidelity Bank & Trust Dubuque | $2.60 billion |
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