Zip Code 64440 — De Kalb, MO
64440 is a ZIP Code associated with De Kalb, MO, located within Buchanan. 64440 ranks #10 out of 10 ZIP codes in Buchanan County by population (and #641 out of 1,035 in MO). The area supports an estimated population of 900 residents across Data Pending housing units, with a population density of 9.6 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.578490, -94.918410)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 64440 |
| Primary City | De Kalb |
| State / Province | MO |
| County | Buchanan |
| Total Population | 900 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 9.6 people/sq mi |
| Timezone | America/Chicago |
How 64440 Compares
| Metric | ZIP 64440 | Buchanan County | MO State Average |
|---|
| Population | 900 | 73,921 (Total) | 6,191,989 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 9.6 /sq mi | -- | -- |
| County Pop Rank | #10 of 10 | -- | -- |
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 →