ZIP Code 61830

61830 is one of Illinois's ZIP codes, delivering to addresses in Cisco, Piatt County.

City: Cisco
County: Piatt County
State: Illinois
Prefix: 618xx

Where this code sits

61830 is part of the 618xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Cisco.

Cisco Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61830 delivers to without sharing its boundary.

ZIP codes nearest 61830

The ZIP codes whose reference points sit closest to 61830.
ZIP code	Distance	Delivers to
ZIP code 61855	5.4 mi	Milmine, IL
ZIP code 61856	7.0 mi	Monticello, IL
ZIP code 62501	7.2 mi	Argenta, IL
ZIP code 61839	8.4 mi	De Land, IL
ZIP code 61813	8.5 mi	Bement, IL
ZIP code 61882	8.9 mi	Weldon, IL
ZIP code 61818	9.1 mi	Cerro Gordo, IL
ZIP code 62554	9.4 mi	Oreana, 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 61830, plotted from its record coordinates.

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

Scope ZIP code 61830. 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.