Zip Code 63544 — Green Castle, MO
63544 is a ZIP Code associated with Green Castle, MO, located within Adair. 63544 ranks #4 out of 6 ZIP codes in Adair County by population (and #579 out of 1,035 in MO). The area supports an estimated population of 1,159 residents across Data Pending housing units, with a population density of 3.2 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (40.246030, -92.849430)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 63544 |
| Primary City | Green Castle |
| State / Province | MO |
| County | Adair |
| Total Population | 1,159 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 3.2 people/sq mi |
| Timezone | America/Chicago |
How 63544 Compares
| Metric | ZIP 63544 | Adair County | MO State Average |
|---|
| Population | 1,159 | 26,534 (Total) | 6,191,989 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 3.2 /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 →