ZIP Code 61011

61011 is one of Illinois's ZIP codes, delivering to addresses in Caledonia, Boone County.

City: Caledonia
County: Boone County
State: Illinois
Prefix: 610xx

Where this code sits

61011 is part of the 610xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Caledonia.

Caledonia Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61011 delivers to without sharing its boundary.

ZIP codes nearest 61011

The ZIP codes whose reference points sit closest to 61011.
ZIP code	Distance	Delivers to
ZIP code 61065	4.2 mi	Poplar Grove, IL
ZIP code 61073	4.7 mi	Roscoe, IL
ZIP code 61114	6.0 mi	Rockford, IL
ZIP code 61115	6.5 mi	Machesney Park, IL
ZIP code 61111	7.0 mi	Loves Park, IL
ZIP code 61012	8.9 mi	Capron, IL
ZIP code 61080	9.0 mi	South Beloit, IL
ZIP code 61008	9.2 mi	Belvidere, 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 61011, plotted from its record coordinates.

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

Scope ZIP code 61011. 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.