ZIP Code 61818

61818 is one of Illinois's ZIP codes, delivering to addresses in Cerro Gordo, Piatt County.

City: Cerro Gordo
County: Piatt County
State: Illinois
Prefix: 618xx

Where this code sits

61818 is part of the 618xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Cerro Gordo.

Cerro Gordo Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61818 delivers to without sharing its boundary.

ZIP codes nearest 61818

The ZIP codes whose reference points sit closest to 61818.
ZIP code	Distance	Delivers to
ZIP code 61936	4.8 mi	La Place, IL
ZIP code 61855	5.2 mi	Milmine, IL
ZIP code 62501	6.2 mi	Argenta, IL
ZIP code 62554	8.3 mi	Oreana, IL
ZIP code 61830	9.1 mi	Cisco, IL
ZIP code 61813	9.1 mi	Bement, IL
ZIP code 61929	9.3 mi	Hammond, IL
ZIP code 62549	10 mi	Mt Zion, 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 61818, plotted from its record coordinates.

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

Scope ZIP code 61818. 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.