ZIP code · De Kalb · Missouri · United States
ZIP code 64440 — De Kalb
ZIP code 64440 serves De Kalb, Missouri.
- Postal code
- 64440Single source Value from one source, not cross-checked.
- City
- De Kalb
- County
- Buchanan FIPS 29021
- State
- Missouri
- Country
- United States
- Coordinates
- 39.5834, -94.9270 — precision precise (locality)
View on OpenStreetMap - Population
- 876 (ZCTA, ACS 5-year)
- Population density
- 24 / sq mi
- Land area
- 36.2 sq mi (93.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $82,679
- Per-capita income
- $35,765
- Median age
- 37
- Households
- 314
- Housing units
- 386
- Median home value
- $191,800
- Median gross rent
- $867 / month
- Congressional district
- MO-6 (119th Congress)
- USDA hardiness zone
- 6b (-5 to 0 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 816Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 64440 with another ZIP · ZIPs within 25 miles · distance from 64440
Map of ZIP code 64440
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 18°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 42 | 54 | 65 | 74 | 84 | 88 | 86 | 79 | 67 | 52 | 40 |
| Avg low °F | 18 | 23 | 32 | 43 | 55 | 65 | 69 | 67 | 58 | 46 | 33 | 23 |
| Precip in | 0.9 | 1.2 | 1.9 | 3.4 | 5.3 | 4.9 | 5.2 | 3.8 | 3.5 | 3.1 | 1.8 | 1.4 |
NOAA 1991–2020 climate normals from the nearest station: ATCHISON (9.8 mi) · NOAA NCEI
Places in ZIP 64440
- 3 schools
- 1 parks
- 1 post offices
- 1 places of worship
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page