ZIP Code 61603

61603 is one of Illinois's ZIP codes, delivering to addresses in Peoria, Peoria County.

City: Peoria
County: Peoria County
State: Illinois
Prefix: 616xx

Where this code sits

61603 is part of the 616xx range, the group of codes handled by one mail processing centre. Peoria is served by 29 ZIP codes in total; the full list, with the county each falls in, is on the Peoria page.

Peoria Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61603 delivers to without sharing its boundary.

ZIP codes nearest 61603

The ZIP codes whose reference points sit closest to 61603.
ZIP code	Distance	Delivers to
ZIP code 61639	0.7 mi	Peoria, IL
ZIP code 61637	1.0 mi	Peoria, IL
ZIP code 61636	1.3 mi	Peoria, IL
ZIP code 61602	1.5 mi	Peoria, IL
ZIP code 61601	1.5 mi	Peoria, IL
ZIP code 61629	1.6 mi	Peoria, IL
ZIP code 61634	1.8 mi	Peoria, IL
ZIP code 61633	1.8 mi	Peoria, 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 61603, plotted from its record coordinates.

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

Scope ZIP code 61603. 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.