ZIP Code 61204

61204 is one of Illinois's ZIP codes, delivering to addresses in Rock Island, Rock Island County.

City: Rock Island
County: Rock Island County
State: Illinois
Prefix: 612xx

Where this code sits

61204 is part of the 612xx range, the group of codes handled by one mail processing centre. Rock Island is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Rock Island page.

Rock Island Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61204 delivers to without sharing its boundary.

ZIP codes nearest 61204

The ZIP codes whose reference points sit closest to 61204.
ZIP code	Distance	Delivers to
ZIP code 52804	1.2 mi	Davenport, IA
ZIP code 52806	1.4 mi	Davenport, IA
ZIP code 52802	2.7 mi	Davenport, IA
ZIP code 52803	3.0 mi	Davenport, IA
ZIP code 52801	3.2 mi	Davenport, IA
ZIP code 52807	3.9 mi	Davenport, IA
ZIP code 52805	4.0 mi	Davenport, IA
ZIP code 52808	4.0 mi	Davenport, IA

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 61204, plotted from its record coordinates.

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

Scope ZIP code 61204. 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.