Casey Illinois ZIP Codes

Casey holds a single ZIP code.

Every ZIP code in Casey

The complete list of Casey, Illinois ZIP codes with the county each falls in.
ZIP code	County
62420	Clark County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Casey codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Casey. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Casey ZIP code begins 624. Those first three digits identify the sectional center facility that processes mail for this part of Illinois. Statewide that range covers 61 ZIP codes, so Casey accounts for 2% of it.

Every Illinois ZIP prefix and the region it covers →

Area codes covering Casey

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Casey occupies.

Casey Illinois area codes in full →

Where Casey's ZIP codes sit

Each point is one Casey ZIP code, plotted from its record coordinates.

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

Cities near Casey

The closest places to Casey with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Martinsville Illinois ZIP codes	6.0 mi	1 ZIP code
Greenup Illinois ZIP codes	10 mi	1 ZIP code
Westfield Illinois ZIP codes	10 mi	1 ZIP code
Yale Illinois ZIP codes	13 mi	1 ZIP code
Hidalgo Illinois ZIP codes	14 mi	1 ZIP code
Toledo Illinois ZIP codes	14 mi	1 ZIP code
Jewett Illinois ZIP codes	15 mi	1 ZIP code
Ashmore Illinois ZIP codes	16 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.