ZIP Code 61277

61277 is one of Illinois's ZIP codes, delivering to addresses in Prophetstown, Whiteside County.

City: Prophetstown
County: Whiteside County
State: Illinois
Prefix: 612xx

Where this code sits

61277 is part of the 612xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Prophetstown.

Prophetstown Illinois ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 61277 delivers to without sharing its boundary.

ZIP codes nearest 61277

The ZIP codes whose reference points sit closest to 61277.
ZIP code	Distance	Delivers to
ZIP code 61261	6.3 mi	Lyndon, IL
ZIP code 61250	7.3 mi	Erie, IL
ZIP code 61258	7.8 mi	Hooppole, IL
ZIP code 61283	8.0 mi	Tampico, IL
ZIP code 61251	8.4 mi	Fenton, IL
ZIP code 61270	13 mi	Morrison, IL
ZIP code 61243	13 mi	Deer Grove, IL
ZIP code 61346	14 mi	New Bedford, 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 61277, plotted from its record coordinates.

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

Scope ZIP code 61277. 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.