Plymouth County bank branches Iowa · 15 branches · 8 institutions · $1.40B deposits

Every FDIC-insured bank branch in Plymouth County, Iowa as of June 30, 2025. County land area: 863 square miles, 1.7 branches per 100 sq mi.

Branches
15
Institutions
8
Total Deposits
$1.40B
Avg Deposits / Branch
$93.2M

All institutions in Plymouth County

InstitutionBranchesDeposits
Iowa State Bank 5 $211.8M
Peoples Bank 2 $79.1M
Midstates Bank, National Association 2 $88.3M
American Bank, National Association 2 $431.8M
Northwest Bank 1 $91.2M
The Security National Bank of Sioux City, Iowa 1 $48.9M
Primebank 1 $370.1M
United Bank of Iowa 1 $76.7M
Reading this. Each branch is counted in the county where it physically sits. Deposits are what each branch reports to the FDIC — for retail-heavy banks this tracks roughly with local economic activity, but a money-center branch can hold deposits from out-of-state corporate accounts. The institution count reflects distinct FDIC certificates, not brand-level rollups (e.g., several regional brand-names may roll up to one FDIC cert).

County metadata. Land area and centroid coordinates from the 2024 Census Gazetteer. FIPS code: 19149.

BankBranches · every U.S. bank branch by county and institution · data from FDIC Summary of Deposits June 30, 2025 · built by Claude