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Zip Code 51537 — Harlan, IA

ZIP Code 51537 is associated with Harlan, IA, in Shelby County. The listed population estimate is 6,382; estimated density is 15.0 people per square mile. Among records with population estimates, it ranks #1 of 10 in Shelby County and #120 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.646460, -95.295310)

Data MetricLocal Statistic
Postal / Zip Code51537
Primary CityHarlan
State / ProvinceIA
CountyShelby
Total Population6,382
Population Density15.0 people/sq mi
TimezoneAmerica/Chicago

How 51537 Compares

MetricZIP 51537Shelby County recordsIA records
Population estimate6,38211,310 (sum)3,210,984 (sum)
Population Density15.0 /sq mi----
County population rank#1 of 10----
State population rank#120 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 51578Westphalia7.2 mi116
ZIP 51447Kirkman7.4 mi113
ZIP 51446Irwin10.4 mi499
ZIP 51531Elk Horn11.4 mi889
ZIP 51543Kimballton11.5 mi478

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 →