Sibley Iowa ZIP Codes

Sibley holds a single ZIP code.

Every ZIP code in Sibley

The complete list of Sibley, Iowa ZIP codes with the county each falls in.
ZIP code	County
51249	Osceola County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Sibley codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Sibley. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Sibley ZIP code begins 512. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 20 ZIP codes, so Sibley accounts for 5% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Sibley

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Sibley occupies.

712 Area code 712

Sibley Iowa area codes in full →

Where Sibley's ZIP codes sit

Each point is one Sibley ZIP code, plotted from its record coordinates.

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

Cities near Sibley

The closest places to Sibley with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Ashton Iowa ZIP codes	6.8 mi	1 ZIP code
Little Rock Iowa ZIP codes	7.6 mi	1 ZIP code
Ocheyedan Iowa ZIP codes	10 mi	1 ZIP code
Melvin Iowa ZIP codes	10 mi	1 ZIP code
George Iowa ZIP codes	14 mi	1 ZIP code
Matlock Iowa ZIP codes	15 mi	1 ZIP code
Harris Iowa ZIP codes	16 mi	1 ZIP code
Sanborn Iowa ZIP codes	16 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.