ZIP code · Alpha · Kentucky · United States
ZIP code 42603 — Alpha
ZIP code 42603 serves Alpha, Kentucky.
- Postal code
- 42603Single source Value from one source, not cross-checked.
- City
- Alpha
- County
- Clinton FIPS 21053
- State
- Kentucky
- Country
- United States
- Coordinates
- 36.7824, -85.0275 — precision precise (locality)
View on OpenStreetMap - Population
- 552 (ZCTA, ACS 5-year)
- Population density
- 48 / sq mi
- Land area
- 11.4 sq mi (29.5 km²) (ZCTA, ACS 5-year)
- Median household income
- $38,942
- Per-capita income
- $36,450
- Median age
- 42.4
- Households
- 231
- Housing units
- 282
- Median home value
- $93,200
- Congressional districts
- KY-5 (also KY-1) (119th Congress)
- USDA hardiness zone
- 7a (0 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
- 606 (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 42603 with another ZIP · ZIPs within 25 miles · distance from 42603
Map of ZIP code 42603
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 26°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 45 | 49 | 58 | 68 | 76 | 83 | 86 | 86 | 81 | 70 | 58 | 48 |
| Avg low °F | 26 | 28 | 35 | 43 | 53 | 62 | 66 | 64 | 57 | 46 | 36 | 30 |
| Precip in | 4.5 | 4.3 | 5.2 | 4.8 | 4.9 | 4.7 | 4.8 | 3.9 | 3.8 | 2.9 | 3.6 | 5.0 |
NOAA 1991–2020 climate normals from the nearest station: MONTICELLO 3 NE (12.5 mi) · NOAA NCEI
Places in ZIP 42603
- 1 post offices
- 4 places of worship
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