ZIP Code 61831

61831 is one of Illinois's ZIP codes, delivering to addresses in Collison, Vermilion County.

City: Collison
County: Vermilion County
State: Illinois
Prefix: 618xx

Where this code sits

61831 is part of the 618xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Collison.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61831 delivers to without sharing its boundary.

ZIP codes nearest 61831

The ZIP codes whose reference points sit closest to 61831.
ZIP code	Distance	Delivers to
ZIP code 61812	5.0 mi	Armstrong, IL
ZIP code 61865	6.2 mi	Potomac, IL
ZIP code 61858	7.2 mi	Oakwood, IL
ZIP code 61857	7.6 mi	Muncie, IL
ZIP code 61848	7.7 mi	Henning, IL
ZIP code 61834	7.8 mi	Danville, IL
ZIP code 61844	8.2 mi	Fithian, IL
ZIP code 61871	9.5 mi	Royal, 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 61831, plotted from its record coordinates.

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

Scope ZIP code 61831. 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.