Mason City, IA
Bank NSB Bank
NSB Bank is a federally insured bank based in Mason City, Iowa.
- Type
- Bank
- Charter
- State-chartered commercial bank, not a Federal Reserve member
- Primary regulator
- FDIC
- Established
- January 1, 1933
- Headquarters
- Mason City, IA
- FDIC certificate #
- 8094
- Fed RSSD ID
- 253646
- Holding company
- Northwood Finl Services Corp
- Website
- www.nsbbank.com
$479M
Total assets Data as of Q1 2026
$415M
Total deposits Data as of Q1 2026
6
Branch locations Data as of Q1 2026
$955K
Net income Data as of Q1 2026
0.81%
Return on assets Data as of Q1 2026
Source: U.S. FDIC BankFind & NCUA 5300 Call Report (public data). Data sources · Data as of Q1 2026
Branches by state
NSB Bank operates 6 branch locations in Iowa. Select a state to drill down to its towns and individual branches.
Ownership
NSB Bank is owned by Northwood Finl Services Corp. See the full ownership & merger history.
Other banks in Iowa
Federally insured banks headquartered in Iowa, by total assets.
- Principal Bank $9.6B
- Bankers Trust Company $7.47B
- Hills Bank and Trust Company $4.67B
- West Bank $4.01B
- Quad City Bank and Trust Company $3.09B
- Northwest Bank $2.97B
- Cedar Rapids Bank and Trust Company $2.87B
- Fidelity Bank & Trust $2.58B
Similar-size banks
Institutions close to NSB Bank’s $479M in assets.
- Citizens State Bank $478.4M
- First Federal Savings Bank of Lincolnton $478.4M
- Iowa State Bank $479.8M
- Springfield State Bank $477.9M
- Northview Bank $477.8M
- Hoyne Savings Bank $477.8M