ZIP Code 61478

61478 is one of Illinois's ZIP codes, delivering to addresses in Smithshire, Warren County.

City: Smithshire
County: Warren County
State: Illinois
Prefix: 614xx

Where this code sits

61478 is part of the 614xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Smithshire.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61478 delivers to without sharing its boundary.

ZIP codes nearest 61478

The ZIP codes whose reference points sit closest to 61478.
ZIP code	Distance	Delivers to
ZIP code 61460	5.1 mi	Media, IL
ZIP code 61471	5.5 mi	Raritan, IL
ZIP code 61473	6.2 mi	Roseville, IL
ZIP code 61447	7.4 mi	Kirkwood, IL
ZIP code 61418	8.3 mi	Biggsville, IL
ZIP code 61480	8.6 mi	Stronghurst, IL
ZIP code 61475	12 mi	Sciota, IL
ZIP code 61462	12 mi	Monmouth, 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 61478, plotted from its record coordinates.

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

Scope ZIP code 61478. 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.