Zip Code 51249 — Sibley, IA

ZIP Code 51249 is associated with Sibley, IA, in Osceola County. The listed population estimate is 3,564; estimated density is 10.9 people per square mile. Among records with population estimates, it ranks #1 of 5 in Osceola County and #175 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (43.410680, -95.732030)

Data MetricLocal Statistic
Postal / Zip Code51249
Primary CitySibley
State / ProvinceIA
CountyOsceola
Total Population3,564
Population Density10.9 people/sq mi
TimezoneAmerica/Chicago

How 51249 Compares

MetricZIP 51249Osceola County recordsIA records
Population estimate3,5645,917 (sum)3,210,984 (sum)
Population Density10.9 /sq mi----
County population rank#1 of 5----
State population rank#175 of 969----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in IA

ZIP CodeCityDistancePopulation estimate
ZIP 51232Ashton8.7 mi658
ZIP 51243Little Rock8.9 mi735
ZIP 51354Ocheyedan9.5 mi965
ZIP 51350Melvin9.8 mi383
ZIP 51237George14.4 mi1,605

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →