ZIP Code 61021

61021 is one of Illinois's ZIP codes, delivering to addresses in Dixon, Lee County.

City: Dixon
County: Lee County
State: Illinois
Prefix: 610xx

Where this code sits

61021 is part of the 610xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Dixon.

Dixon Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61021 delivers to without sharing its boundary.

ZIP codes nearest 61021

The ZIP codes whose reference points sit closest to 61021.
ZIP code	Distance	Delivers to
ZIP code 61091	4.7 mi	Woosung, IL
ZIP code 61057	5.3 mi	Nachusa, IL
ZIP code 61324	6.6 mi	Eldena, IL
ZIP code 61031	8.9 mi	Franklin Grove, IL
ZIP code 61042	11 mi	Harmon, IL
ZIP code 61064	11 mi	Polo, IL
ZIP code 61081	12 mi	Sterling, IL
ZIP code 61071	12 mi	Rock Falls, 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 61021, plotted from its record coordinates.

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

Scope ZIP code 61021. 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.