ZIP Code 51249

51249 is one of Iowa's ZIP codes, delivering to addresses in Sibley, Osceola County.

City: Sibley
County: Osceola County
State: Iowa
Prefix: 512xx

Where this code sits

51249 is part of the 512xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Sibley.

Sibley Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51249 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51249

The ZIP codes whose reference points sit closest to 51249.
ZIP code	Distance	Delivers to
ZIP code 51232	7.1 mi	Ashton, IA
ZIP code 51243	8.1 mi	Little Rock, IA
ZIP code 56117	9.9 mi	Bigelow, MN
ZIP code 51354	11 mi	Ocheyedan, IA
ZIP code 51350	11 mi	Melvin, IA
ZIP code 51237	13 mi	George, IA
ZIP code 51244	15 mi	Matlock, IA
ZIP code 56168	15 mi	Rushmore, MN

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 51249, plotted from its record coordinates.

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

Scope ZIP code 51249. 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.