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Zip Code 51545 — Little Sioux, IA

ZIP Code 51545 is associated with Little Sioux, IA, in Harrison County. The listed population estimate is 267; estimated density is 2.2 people per square mile. Among records with population estimates, it ranks #8 of 10 in Harrison County and #814 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.838970, -96.020720)

Data MetricLocal Statistic
Postal / Zip Code51545
Primary CityLittle Sioux
State / ProvinceIA
CountyHarrison
Total Population267
Population Density2.2 people/sq mi
TimezoneAmerica/Chicago

How 51545 Compares

MetricZIP 51545Harrison County recordsIA records
Population estimate26714,759 (sum)3,210,984 (sum)
Population Density2.2 /sq mi----
County population rank#8 of 10----
State population rank#814 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 51523Blencoe5.7 mi379
ZIP 51564Pisgah6.1 mi520
ZIP 51557Mondamin7.7 mi828
ZIP 51558Moorhead9.4 mi549
ZIP 51550Magnolia12.7 mi169

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 →