ZIP code · Effingham · Kansas · United States
ZIP code 66023 — Effingham
ZIP code 66023 serves Effingham, Kansas.
- Postal code
- 66023Single source Value from one source, not cross-checked.
- City
- Effingham
- County
- Atchison FIPS 20005
- State
- Kansas
- Country
- United States
- Coordinates
- 39.5222, -95.4008 — precision precise (locality)
View on OpenStreetMap - Population
- 954 (ZCTA, ACS 5-year)
- Population density
- 13 / sq mi
- Land area
- 72 sq mi (186.5 km²) (ZCTA, ACS 5-year)
- Median household income
- $54,955
- Per-capita income
- $36,676
- Median age
- 61.4
- Households
- 475
- Housing units
- 526
- Median home value
- $108,400
- Median gross rent
- $846 / month
- Congressional district
- KS-2 (119th Congress)
- USDA hardiness zone
- 6a (-10 to -5 °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
- 913Telephone 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 66023 with another ZIP · ZIPs within 25 miles · distance from 66023
Map of ZIP code 66023
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 16°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 43 | 54 | 64 | 75 | 84 | 88 | 87 | 80 | 67 | 53 | 41 |
| Avg low °F | 16 | 20 | 30 | 41 | 53 | 64 | 68 | 65 | 56 | 42 | 30 | 20 |
| Precip in | 0.8 | 1.3 | 2.1 | 3.8 | 5.2 | 4.8 | 5.4 | 4.3 | 3.7 | 3.3 | 1.8 | 1.5 |
NOAA 1991–2020 climate normals from the nearest station: HORTON (11.9 mi) · NOAA NCEI
Places in ZIP 66023
- 4 schools
- 1 playgrounds
- 1 libraries
- 1 places of worship
- 3 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