ZIP Code 62420

62420 is one of Illinois's ZIP codes, delivering to addresses in Casey, Clark County.

City: Casey
County: Clark County
State: Illinois
Prefix: 624xx

Where this code sits

62420 is part of the 624xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Casey.

Casey Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 62420 delivers to without sharing its boundary.

ZIP codes nearest 62420

The ZIP codes whose reference points sit closest to 62420.
ZIP code	Distance	Delivers to
ZIP code 62442	6.5 mi	Martinsville, IL
ZIP code 62428	7.4 mi	Greenup, IL
ZIP code 62474	11 mi	Westfield, IL
ZIP code 62481	12 mi	Yale, IL
ZIP code 62468	14 mi	Toledo, IL
ZIP code 62435	14 mi	Janesville, IL
ZIP code 62432	15 mi	Hidalgo, IL
ZIP code 62436	15 mi	Jewett, 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 62420, plotted from its record coordinates.

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

Scope ZIP code 62420. 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.