ZIP Code 62539

62539 is one of Illinois's ZIP codes, delivering to addresses in Illiopolis, Sangamon County.

City: Illiopolis
County: Sangamon County
State: Illinois
Prefix: 625xx

Where this code sits

62539 is part of the 625xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Illiopolis.

Illiopolis Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 62539 delivers to without sharing its boundary.

ZIP codes nearest 62539

The ZIP codes whose reference points sit closest to 62539.
ZIP code	Distance	Delivers to
ZIP code 62551	4.3 mi	Niantic, IL
ZIP code 62547	5.6 mi	Mount Auburn, IL
ZIP code 62515	7.2 mi	Buffalo, IL
ZIP code 62537	8.8 mi	Harristown, IL
ZIP code 62543	9.4 mi	Latham, IL
ZIP code 62545	9.6 mi	Mechanicsburg, IL
ZIP code 62541	9.9 mi	Lake Fork, IL
ZIP code 62519	10 mi	Cornland, IL

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 62539, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 62539. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.