Allen County ZIP Codes
Kentucky, United States · 3 codes
Allen County in Kentucky has 3 ZIP codes, from 42120 to 42164, serving 3 places.
ZIP codes in Allen
Frequently asked questions
What is the ZIP code of Allen?
Allen has 3 ZIP codes, from 42120 to 42164. The table lists the places each one serves.
How many places are listed in Allen County?
3 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.