Clinton County ZIP Codes

Clinton County is a county of Iowa.

ZIP codes
18
Cities & towns
15
Area codes
1
Land area
695 sq mi

Every ZIP code in Clinton County

520xx–527xx
The complete list of Clinton County, IA ZIP codes with the city each one delivers to.
ZIP codeCity
52037Delmar
52254Lost Nation
52701Andover
52727Bryant
52729Calamus
52730Camanche
52731Charlotte
52732Clinton
52733Clinton
52734Clinton
52736Clinton
52742De Witt
52750Goose Lake
52751Grand Mound
52757Low Moor
52771Teeds Grove
52774Welton
52777Wheatland

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Clinton County codes above are listed without a column we would have to invent.

Cities and towns in Clinton County

A further 3 places in Clinton County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering Clinton County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

Where Clinton County's ZIP codes sit

Each point is the reference point of one Clinton County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.
  • Reference points and footprint
  • Not an official NANPA boundary
  • Not a USPS delivery area

Scope every ZIP code recorded in Clinton County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated . The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.