Effingham County ZIP Codes

Effingham County is a county of Illinois.

ZIP codes: 10
Cities & towns: 10
Area codes: 4
Land area: 479 sq mi

Every ZIP code in Effingham County

624xx

The complete list of Effingham County, IL ZIP codes with the city each one delivers to.
ZIP code	City
62401	Effingham
62411	Altamont
62414	Beecher City
62424	Dieterich
62426	Edgewood
62443	Mason
62445	Montrose
62461	Shumway
62467	Teutopolis
62473	Watson

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Effingham County

Area codes covering Effingham County

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

Where Effingham County's ZIP codes sit

Each point is the reference point of one Effingham 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 Effingham 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.