ZIP Code 61233

61233 is one of Illinois's ZIP codes, delivering to addresses in Andover, Henry County.

City: Andover
County: Henry County
State: Illinois
Prefix: 612xx

Where this code sits

61233 is part of the 612xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Andover.

Andover Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61233 delivers to without sharing its boundary.

ZIP codes nearest 61233

The ZIP codes whose reference points sit closest to 61233.
ZIP code	Distance	Delivers to
ZIP code 61262	2.1 mi	Lynn Center, IL
ZIP code 61274	4.9 mi	Osco, IL
ZIP code 61238	5.8 mi	Cambridge, IL
ZIP code 61468	5.8 mi	Ophiem, IL
ZIP code 61273	6.8 mi	Orion, IL
ZIP code 61490	7.6 mi	Woodhull, IL
ZIP code 61413	8.5 mi	Alpha, IL
ZIP code 61281	11 mi	Sherrard, 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 61233, plotted from its record coordinates.

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

Scope ZIP code 61233. 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.