Zip Code 73620 — Arapaho, OK
73620 is a ZIP Code associated with Arapaho, OK, located within Custer. 73620 ranks #4 out of 6 ZIP codes in Custer County by population (and #358 out of 664 in OK). The area supports an estimated population of 1,378 residents across Data Pending housing units, with a population density of 5.1 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (35.613870, -99.022780)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 73620 |
| Primary City | Arapaho |
| State / Province | OK |
| County | Custer |
| Total Population | 1,378 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 5.1 people/sq mi |
| Timezone | America/Chicago |
How 73620 Compares
| Metric | ZIP 73620 | Custer County | OK State Average |
|---|
| Population | 1,378 | 28,079 (Total) | 4,028,588 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 5.1 /sq mi | -- | -- |
| County Pop Rank | #4 of 6 | -- | -- |
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 →