Zip Code 51346 — Hartley, IA

ZIP Code 51346 is associated with Hartley, IA, in O'Brien County. The listed population estimate is 2,247; estimated density is 5.9 people per square mile. Among records with population estimates, it ranks #1 of 8 in O'Brien County and #255 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (43.186380, -95.459270)

Data MetricLocal Statistic
Postal / Zip Code51346
Primary CityHartley
State / ProvinceIA
CountyO'Brien
Total Population2,247
Population Density5.9 people/sq mi
TimezoneAmerica/Chicago

How 51346 Compares

MetricZIP 51346O'Brien County recordsIA records
Population estimate2,2479,215 (sum)3,210,984 (sum)
Population Density5.9 /sq mi----
County population rank#1 of 8----
State population rank#255 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 51338Everly7.0 mi852
ZIP 51248Sanborn10.1 mi1,534
ZIP 51245Primghar10.4 mi1,377
ZIP 51350Melvin10.9 mi383
ZIP 51357Royal12.2 mi910

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 →