ZIP Code 62351

62351 is one of Illinois's ZIP codes, delivering to addresses in Mendon, Adams County.

City: Mendon
County: Adams County
State: Illinois
Prefix: 623xx

Where this code sits

62351 is part of the 623xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mendon.

Mendon Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 62351 delivers to without sharing its boundary.

ZIP codes nearest 62351

The ZIP codes whose reference points sit closest to 62351.
ZIP code	Distance	Delivers to
ZIP code 62376	4.4 mi	Ursa, IL
ZIP code 62359	5.6 mi	Paloma, IL
ZIP code 62349	6.2 mi	Loraine, IL
ZIP code 62325	6.4 mi	Coatsburg, IL
ZIP code 62338	6.9 mi	Fowler, IL
ZIP code 62348	7.9 mi	Lima, IL
ZIP code 62305	8.7 mi	Quincy, IL
ZIP code 62301	12 mi	Quincy, 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 62351, plotted from its record coordinates.

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

Scope ZIP code 62351. 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.