ZIP Code 61031

61031 is one of Illinois's ZIP codes, delivering to addresses in Franklin Grove, Lee County.

City: Franklin Grove
County: Lee County
State: Illinois
Prefix: 610xx

Where this code sits

61031 is part of the 610xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Franklin Grove.

Franklin Grove Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61031 delivers to without sharing its boundary.

ZIP codes nearest 61031

The ZIP codes whose reference points sit closest to 61031.
ZIP code	Distance	Delivers to
ZIP code 61057	4.2 mi	Nachusa, IL
ZIP code 61006	5.6 mi	Ashton, IL
ZIP code 61331	7.8 mi	Lee Center, IL
ZIP code 61324	7.8 mi	Eldena, IL
ZIP code 61021	8.9 mi	Dixon, IL
ZIP code 61061	11 mi	Oregon, IL
ZIP code 61310	11 mi	Amboy, IL
ZIP code 61015	11 mi	Chana, 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 61031, plotted from its record coordinates.

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

Scope ZIP code 61031. 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.