ZIP Code 61237

61237 is one of Illinois's ZIP codes, delivering to addresses in Buffalo Prairie, Rock Island County.

City: Buffalo Prairie
County: Rock Island County
State: Illinois
Prefix: 612xx

Where this code sits

61237 is part of the 612xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Buffalo Prairie.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61237 delivers to without sharing its boundary.

ZIP codes nearest 61237

The ZIP codes whose reference points sit closest to 61237.
ZIP code	Distance	Delivers to
ZIP code 61259	4.2 mi	Illinois City, IL
ZIP code 61284	6.9 mi	Taylor Ridge, IL
ZIP code 61260	7.6 mi	Joy, IL
ZIP code 52759	9.0 mi	Montpelier, IA
ZIP code 61232	9.9 mi	Andalusia, IL
ZIP code 52728	11 mi	Buffalo, IA
ZIP code 61272	11 mi	New Boston, IL
ZIP code 61231	11 mi	Aledo, 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 61237, plotted from its record coordinates.

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

Scope ZIP code 61237. 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.