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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

Zip Code 40121, Fort Knox, KY

ZIP Code 40121 Details

Zip Code:40121
City:Fort Knox
State:KY [Kentucky]
Counties:HARDIN, KY
Multi County:Yes
City Alias(es):Fort Knox
Area Code:502
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Eastern (GMT -05:00)
Observes Daylight Saving:Yes
Elevation:685 ft
State FIPS:21
County FIPS:093
Division:East South Central
Intro Date:<2004-10

ZIP Code 40121 2010 Census Demographics

Current Population:9,917
2010 Population:10,124
Households per ZIP Code:2,361
Average House Value:$0
Avg. Income Per Household:$70,441
Persons Per Household:3.44
White Population:7,697
Black Population:1,955
Hispanic Population:1,424
Asian Population:322
American Indian Population:234
Hawaiian Population:93
Other Population:425
Male Population:5,898
Female Population:4,226
Median Age:22.80 years
Male Median Age:23.00 years
Female Median Age:22.60 years

ZIP Code 40121 Other Demographics

# Residential Mailboxes:2,883
# Business Mailboxes:53
Total Delivery Receptacles:3,225
Number of Businesses:70
1st Quarter Payroll:$37,941,000
Annual Payroll:$150,367,000
# of Employees:2,370
Water Area:0.075 sq mi
Land Area:35.217 sq mi
118th Congressional District:02
118th Congressional Land Area:7177.44 sq mi
Single Family Delivery Units:1,681
Multi Family Delivery Units:282
# Residential Mailboxes:2,883
# Business Mailboxes:53
Total Delivery Receptacles:3,225

ZIP Code 40121 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 215 225 +10
Retired Workers: 80 95 +15
Disabled Workers: 55 55 0
Widow(er)s and Parents: 10 15 +5
Spouses: 5 5 0
Children: 65 55 -10
65+: 85 105 +20
Monthly Benefits - All: $225,000 $266,000 +$41,000
Monthly Benefits - Retired Workers: $101,000 $134,000 +$33,000
Monthly Benefits - Widow(ers): $16,000 $24,000 +$8,000

ZIP Code 40121 Statistical Areas

CBSA: 21060
CBSA Name: Elizabethtown-Fort Knox, KY
CBSA Type: Metro
CBSA Division: 
CBSA Division Name: 
CBSA Population:119,736
CBSA Division Population:0
MSA Name: 
PMSA Name: 
City State Key:X15035
Preferred Last Line Key:X15035
40119: Previous ZIP Code
Next ZIP Code: 40122


  1. U.S. Postal Service [Last Updated: 3/1/2023],
  2. Internal Data Creation [Last Updated: 3/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census American National Standards Institute (ANSI) [Last Updated: 3/1/2023],
  6. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],
  7. Centers for Medicare & Medicaid Services [Updated Yearly],