Zip Code 51439 — Charter Oak, IA
51439 is a ZIP Code associated with Charter Oak, IA, located within Crawford. 51439 ranks #4 out of 12 ZIP codes in Crawford County by population (and #525 out of 970 in IA). The area supports an estimated population of 818 residents across Data Pending housing units, with a population density of 3.7 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (42.082980, -95.583470)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 51439 |
| Primary City | Charter Oak |
| State / Province | IA |
| County | Crawford |
| Total Population | 818 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 3.7 people/sq mi |
| Timezone | America/Chicago |
How 51439 Compares
| Metric | ZIP 51439 | Crawford County | IA State Average |
|---|
| Population | 818 | 16,249 (Total) | 3,210,984 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 3.7 /sq mi | -- | -- |
| County Pop Rank | #4 of 12 | -- | -- |
Nearby ZIP Codes
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 →