ZIP Code 61378

61378 is one of Illinois's ZIP codes, delivering to addresses in West Brooklyn, Lee County.

City: West Brooklyn
County: Lee County
State: Illinois
Prefix: 613xx

Where this code sits

61378 is part of the 613xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to West Brooklyn.

West Brooklyn Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61378 delivers to without sharing its boundary.

ZIP codes nearest 61378

The ZIP codes whose reference points sit closest to 61378.
ZIP code	Distance	Delivers to
ZIP code 61331	4.9 mi	Lee Center, IL
ZIP code 61318	6.1 mi	Compton, IL
ZIP code 61367	7.0 mi	Sublette, IL
ZIP code 61310	8.2 mi	Amboy, IL
ZIP code 61006	9.4 mi	Ashton, IL
ZIP code 61031	11 mi	Franklin Grove, IL
ZIP code 61324	12 mi	Eldena, IL
ZIP code 61353	12 mi	Paw Paw, 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 61378, plotted from its record coordinates.

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

Scope ZIP code 61378. 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.