ZIP Code 61426

61426 is one of Illinois's ZIP codes, delivering to addresses in Castleton, Stark County.

City: Castleton
County: Stark County
State: Illinois
Prefix: 614xx

Where this code sits

61426 is part of the 614xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Castleton.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61426 delivers to without sharing its boundary.

ZIP codes nearest 61426

The ZIP codes whose reference points sit closest to 61426.
ZIP code	Distance	Delivers to
ZIP code 61421	3.7 mi	Bradford, IL
ZIP code 61424	4.7 mi	Camp Grove, IL
ZIP code 61491	5.5 mi	Wyoming, IL
ZIP code 61483	8.1 mi	Toulon, IL
ZIP code 61479	9.5 mi	Speer, IL
ZIP code 61345	13 mi	Neponset, IL
ZIP code 61449	13 mi	La Fayette, IL
ZIP code 61526	14 mi	Edelstein, 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 61426, plotted from its record coordinates.

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

Scope ZIP code 61426. 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.