51537 Zip Code Harlan Shelby IA United States
| City | Harlan |
| County | Shelby |
| State | Iowa |
| Latitude | 41.64646 |
| Longitude | -95.29531 |
| Population | 6,382 |
| Density | 38.86 people per square mile |
| Time Zone | America/Chicago |
Median household: $65,000
Median individual: $35,000
Mode: 90.2% White
Median house value: $166,888.0
Median: 43.0 years old
With at least college degree: 25.1%
With STEM degree: 30.5%
Never married: 24.0%
Unemployed: 4.1%
All data comes from the SimpleMaps US Zips Comprehensive Database, February 2026.
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