GNB Bank
✓ FDIC-insured · Active FDIC Certificate #14079
GNB Bank is an FDIC-insured state-chartered bank that is a member of the Federal Reserve System, headquartered in Grundy Center, Iowa, established in 1934. As of the 06/30/2026 FDIC call report, it reported $621M in total assets and $498M in deposits. FDIC location data lists 10 offices in Iowa. The FDIC classifies it as a community bank. It is owned by the holding company GNB BCORP (Grundy Center, IA).
Financial data as of the 06/30/2026 FDIC call report.
Where it operates
All 10 of GNB Bank's FDIC-listed offices are in Iowa. Browse banks in Grundy Center for other local options.
Branch locations
| GNB Bank Gnb Manchester Branch · Full Service - Brick And Mortar | 300 E Main St Manchester, IA 52057 Map ↗ |
| GNB Bank Story City Office · Full Service - Brick And Mortar | 629 Broad St Story City, IA 50248 Map ↗ |
| GNB Bank Messenger Service Branch · Limited Service - Messenger | 103 E Center St Conrad, IA 50621 Map ↗ |
| GNB Bank Conrad Office Branch · Full Service - Brick And Mortar | 103 E Center St Conrad, IA 50621 Map ↗ |
| GNB Bank Timberland Village Branch · Limited Service - Mobile/Seasonal | 725 Timberland Dr Story City, IA 50248 Map ↗ |
| GNB Bank Iowa Falls Downtown Branch · Full Service - Brick And Mortar | 315 Main St Iowa Falls, IA 50126 Map ↗ |
| GNB Bank Marshalltown Branch · Full Service - Brick And Mortar | 2504 S 2nd St Marshalltown, IA 50158 Map ↗ |
| GNB Bank Insurance & Investments · Limited Service - Administrative | 603 7th St Grundy Center, IA 50638 Map ↗ |
| GNB Bank Gnb Bank · Full Service - Brick And Mortar | 529 G Ave Grundy Center, IA 50638 Map ↗ |
| GNB Bank Ackley Branch · Full Service - Brick And Mortar | 308 Sherman Ave Ackley, IA 50601 Map ↗ |
Holding company: GNB BCORP
The FDIC lists GNB BCORP, based in Grundy Center, IA, as the top holding company for GNB Bank. The FDIC shows no other active insured banks under the same holding company.
Similar-size banks in Iowa
Active FDIC-insured banks headquartered in Iowa with total assets closest to GNB Bank's $621M. See all banks in Iowa.
| Bank | HQ city | Assets | Offices |
|---|---|---|---|
| Marion County State Bank | Pella | $629M | 5 |
| Liberty National Bank | Sioux City | $624M | 10 |
| South Story Bank & Trust | Slater | $624M | 6 |
| Farmers Trust and Savings Bank | Spencer | $618M | 1 |
| Farmers & Merchants Savings Bank | Manchester | $617M | 7 |
| Community Savings Bank | Edgewood | $614M | 12 |
| Peoples Savings Bank | Indianola | $610M | 8 |
| Washington State Bank | Washington | $601M | 5 |
GNB Bank: common questions
Is GNB Bank FDIC-insured?
Yes. GNB Bank is an active FDIC-insured institution, FDIC Certificate #14079. Deposits are insured up to $250,000 per depositor, per ownership category. You can confirm this on FDIC BankFind.
Where is GNB Bank headquartered?
GNB Bank is headquartered at 529 G Ave, Grundy Center, IA 50638, according to FDIC records.
How many branches does GNB Bank have?
FDIC location data lists 10 offices for GNB Bank, all in Iowa.
Who owns GNB Bank?
The FDIC lists GNB BCORP of Grundy Center, IA as the top holding company for GNB Bank.
Source: FDIC BankFind Suite (institution, location, and call report data). BankNearMe.com does not rank or rate banks.