ZIP code · Fairfield · Kentucky · United States
ZIP code 40020 — Fairfield
ZIP code 40020 serves Fairfield, Kentucky.
- Postal code
- 40020Single source Value from one source, not cross-checked.
- City
- Fairfield
- County
- Nelson FIPS 21179
- State
- Kentucky
- Country
- United States
- Coordinates
- 37.9340, -85.3862 — precision precise (locality)
View on OpenStreetMap - Population
- 197 (ZCTA, ACS 5-year)
- Population density
- 415 / sq mi
- Land area
- 0.5 sq mi (1.2 km²) (ZCTA, ACS 5-year)
- Median household income
- $87,951
- Per-capita income
- $28,738
- Median age
- 59.9
- Households
- 128
- Housing units
- 128
- Congressional district
- KY-4 (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/New_York (UTC−5 / UTC−4 DST)
- Area code
- 502 (from the nearest rate centre)Telephone 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 40020 with another ZIP · ZIPs within 25 miles · distance from 40020
Map of ZIP code 40020
Climate — monthly normals
Warmest month Jul (avg high 90°F), coldest Jan (avg low 22°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 48 | 59 | 70 | 79 | 87 | 90 | 89 | 84 | 72 | 58 | 47 |
| Avg low °F | 22 | 25 | 33 | 41 | 51 | 60 | 64 | 62 | 55 | 42 | 34 | 27 |
| Precip in | 3.5 | 3.9 | 5.0 | 4.9 | 5.6 | 4.9 | 5.3 | 3.5 | 3.7 | 3.9 | 3.9 | 4.5 |
NOAA 1991–2020 climate normals from the nearest station: TAYLORSVILLE LAKE (6.3 mi) · NOAA NCEI
Places in ZIP 40020
- 2 post offices
- 1 places of worship
- 1 gas 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