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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Fort Knox, KY

Fort Knox, KY Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 40121StandardHardin10,124502
ZIP Code 40122StandardHardin0502

Timezone(s):Eastern (GMT -05:00)
Counties:HARDIN, KY
Population:10,124 (More Details)
Male Population:5,898
Female Population:4,226
Median Age:23
ZIP Codes:2
Area Codes:1
Total Area:630 square miles (county)
Land Area:623 square miles (county)
Water Area:7 square miles (county)

Fort Knox, KY Demographic Information *

Total population10,124
Male population5,898
Female population4,226
Median age (years)22.8
White Population7,247
Black Population1,677
Indian Population111
Asian Population168
Hawaiian Population59
Hispanic Population1,424
Median age (Male)23
Median age (Female)22.6
Total households2,361
Family households (families)2,156
Average household size3.44
Average family size3.64
Total housing units2,961
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],