Iroquois County ZIP Codes

Iroquois County is a county of Illinois.

ZIP codes: 24
Cities & towns: 24
Area codes: 4
Land area: 1,117 sq mi

Every ZIP code in Iroquois County

609xx

The complete list of Iroquois County, IL ZIP codes with the city each one delivers to.
ZIP code	City
60911	Ashkum
60912	Beaverville
60918	Buckley
60922	Chebanse
60924	Cissna Park
60926	Claytonville
60927	Clifton
60928	Crescent City
60930	Danforth
60931	Donovan
60938	Gilman
60939	Goodwine
60945	Iroquois
60948	Loda
60951	Martinton
60953	Milford
60955	Onarga
60956	Papineau
60966	Sheldon
60967	Stockland
60968	Thawville
60970	Watseka
60973	Wellington
60974	Woodland

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Iroquois County codes above are listed without a column we would have to invent.

Cities and towns in Iroquois County

A further 3 places in Iroquois 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 Iroquois County

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

Where Iroquois County's ZIP codes sit

Each point is the reference point of one Iroquois 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 Iroquois 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 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.