ZIP Code 61071

61071 is one of Illinois's ZIP codes, delivering to addresses in Rock Falls, Whiteside County.

City: Rock Falls
County: Whiteside County
State: Illinois
Prefix: 610xx

Where this code sits

61071 is part of the 610xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rock Falls.

Rock Falls Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61071 delivers to without sharing its boundary.

ZIP codes nearest 61071

The ZIP codes whose reference points sit closest to 61071.
ZIP code	Distance	Delivers to
ZIP code 61081	2.8 mi	Sterling, IL
ZIP code 61037	3.8 mi	Galt, IL
ZIP code 61042	7.9 mi	Harmon, IL
ZIP code 61243	9.3 mi	Deer Grove, IL
ZIP code 61283	9.5 mi	Tampico, IL
ZIP code 61021	12 mi	Dixon, IL
ZIP code 61261	12 mi	Lyndon, IL
ZIP code 61091	12 mi	Woosung, 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 61071, plotted from its record coordinates.

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

Scope ZIP code 61071. 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.