Fort Knox ZIP Codes — Hardin County, KY

There are 2 unique ZIP codes in Fort Knox, Kentucky. Area code: 502.
2
ZIP codes
35.22
sq mi land
0.08
sq mi water
502
area code
Fort Knox, KY ZIP code map

About Fort Knox, KY

Fort Knox, Kentucky, is a prominent military installation located in Hardin County. Known for housing the United States Bullion Depository, Fort Knox has gained a reputation for its significant role in American history and defense. The city offers a unique blend of military heritage and small-town charm.

Location & geography

Fort Knox is strategically situated in central Kentucky, approximately 25 miles south of Louisville and around 40 miles north of Elizabethtown. The total land area of Fort Knox encompasses 35.22 square miles, while its water area covers a mere 0.08 square miles. The terrain is predominantly flat, consistent with the surrounding areas of the Bluegrass region.

Community & economy

The community surrounding Fort Knox is primarily comprised of military personnel and their families, creating a vibrant and close-knit atmosphere. The local economy is heavily influenced by the military presence, with various industries supporting the base and contributing to daily life. Residents enjoy a range of recreational activities, cultural events, and community programs, enhancing the overall quality of life.

Transportation

Fort Knox is accessible via several major highways, including Interstate 65, which connects the city to larger metropolitan areas. The nearest airport is Louisville International Airport, located about 25 miles from Fort Knox, providing both commercial and cargo services. Public transport options are limited due to its military nature, but the area is well-connected by road.

History

Fort Knox was established in 1918 and named after Major General Henry Knox, the first U.S. Secretary of War. Initially a training site for military units, it gained fame during World War II for its armored divisions. Today, Fort Knox is known for its historic Gold Vault, which has stored a substantial portion of the United States' gold reserves.

Did you know?

A little-known fact about Fort Knox is that the U.S. Bullion Depository is often mistakenly believed to be open to the public, but it remains one of the most secured locations in the world. Additionally, the area has been featured in various movies and documentaries due to its historical significance.

ZIP codes for Fort Knox, KY (2)
ZIP code City County Map
40121 Fort Knox Hardin View map
40122 Fort Knox Hardin View map

Demographics & statistics

8,655
Population
24.7
Median age
$76,864
Median household income
$31,450
Per capita income
$0
Median home value
$1,178
Median monthly rent
0.7%
Home ownership
4.3%
Poverty rate
8.8%
Unemployment
266
Housing units
40.7%
Bachelor's or higher

Age distribution

Male Female
547
Under 5
440
456
5–9
368
358
10–14
288
321
15–19
259
740
20–24
595
1,048
25–34
843
884
35–44
712
292
45–54
236
37
55–59
29
43
60–64
34
44
65–74
36
23
75–84
18
2
85+
2
← Male
Female →

Age summary

GroupCount%
Under 182,69031.1%
18 and over5,96568.9%
65 and over1251.4%
Median age24.7 years

Race & ethnicity

White 51.2%
Black or African American 16.3%
Hispanic or Latino 12.2%
Two or more races 12.1%
Other race 3.2%
Asian 2.5%
Native Hawaiian / Pacific Islander 1.8%
American Indian / Alaska Native 0.8%
GroupCount%
White5,04551.2%
Black or African American1,61216.3%
Hispanic or Latino1,20812.2%
Two or more races1,19112.1%
Other race3153.2%
Asian2442.5%
Native Hawaiian / Pacific Islander1731.8%
American Indian / Alaska Native750.8%

Household income

Under $10k 1.4%
$10k–$15k 1.0%
$15k–$25k 2.4%
$25k–$35k 7.3%
$35k–$50k 10.2%
$50k–$75k 25.9%
$75k–$100k 11.0%
$100k–$150k 27.1%
$150k–$200k 9.4%
$200k+ 4.4%
Range% of households
Under $10k1.4%
$10k–$15k1.0%
$15k–$25k2.4%
$25k–$35k7.3%
$35k–$50k10.2%
$50k–$75k25.9%
$75k–$100k11.0%
$100k–$150k27.1%
$150k–$200k9.4%
$200k+4.4%
Median income$76,864

Housing

Home values

Under $50k 100.0%

Housing overview

MetricValue
Median home value$0
Median rent / month$1,178
Owner occupied0.7%
Renter occupied99.3%
Vacant9.9%
Single-family detached21.9%
Large apartment buildings7.8%
Mobile homes0.2%
Median rooms5.5
Avg household size (owned)2.27

Year built

Era%
2020 or later0.0%
2010–201919.7%
2000–200911.1%
1990–19994.4%
1980–19899.9%
1970–197912.1%
1960–196917.5%
1950–195913.9%
1940–19495.4%
1939 or earlier6.1%

Bedrooms

Size% of units
No bedroom (studio)9.8%
1 bedroom3.3%
2 bedrooms10.4%
3 bedrooms58.2%
4 bedrooms12.8%
5+ bedrooms5.5%

Vehicles per household

Vehicles% of households
No vehicle1.8%
1 vehicle35.0%
2 vehicles53.6%
3 or more9.7%

Heating fuel

Fuel type%
Utility gas39.9%
Electricity58.7%
Propane / LP gas0.3%
Wood0.3%
No fuel used0.5%

Households & families

Household typeCount%
Married-couple family1,41161.7%
Cohabiting couple793.5%
Male householder, no spouse47820.9%
Female householder, no spouse32014.0%
Households with children under 181,19052.0%
Households with seniors (65+)893.9%
Average household size3.10

Marital status

StatusMaleFemale
Never married47.7%26.2%
Married44.7%65.6%
Separated0.6%0.1%
Widowed0.0%2.0%
Divorced7.1%6.1%

Education

Less than 9th grade 1.7%
Some HS, no diploma 3.5%
HS graduate 14.3%
Some college, no degree 27.8%
Associate's degree 12.1%
Bachelor's degree 21.5%
Graduate / professional 19.2%
Metric%
HS diploma or higher94.8%
Bachelor's or higher40.7%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool46616.0%
Kindergarten1133.9%
Elementary school1,25843.1%
High school34311.8%
College / grad school73925.3%

Employment

Industry of employment

Education & healthcare 24.8%
Retail trade 19.0%
Public administration 18.2%
Arts, food & hospitality 8.9%
Manufacturing 8.3%
Professional & management 6.0%
Construction 4.1%
Agriculture & mining 2.7%
Transportation & utilities 2.7%
Information 2.5%
Finance & real estate 1.2%
Other services 1.2%
Wholesale trade 0.4%

Occupation

Category%
Management, business & arts37.6%
Service17.9%
Sales & office23.0%
Natural resources & construction9.4%
Production & transportation12.1%

Employment type

Type%
Private sector60.0%
Government39.4%
Self-employed0.6%
Unpaid family workers0.0%

Commute

Method%
Drive alone70.8%
Carpool7.9%
Public transit0.8%
Walk17.1%
Other means1.0%
Avg commute (minutes)11.9

Poverty

All people 4.3%
Under 18 years 7.0%
18 and over 2.6%
Married-couple families 2.1%
Female-led households 16.9%

Income support

Source% of households
Social Security7.2%
Retirement income13.3%
Supplemental Security2.8%
Cash public assistance0.7%
Food stamps / SNAP2.0%

Health indicators

Condition%
High blood pressure19.3%
High cholesterol17.3%
Heart disease1.5%
Stroke0.9%
Asthma10.6%
Arthritis10.4%
Kidney disease1.0%
Pulmonary disease3.1%
Cancer1.6%
Behavior / access%
Binge drinking22.3%
No physical activity21.0%
Less than 7 hrs sleep38.0%
Fair or poor health10.6%
Poor mental health19.6%
Poor physical health7.0%
No health insurance11.5%
Visited doctor (checkup)69.4%
Visited dentist56.7%
Cholesterol screening82.1%
Teeth loss10.4%

Veterans & disability

VeteransCount%
Civilian veterans66723.3%
Disability%
Any disability9.7%
Under 186.2%
18–64 years12.2%
65 and over33.6%

Health insurance coverage

Type%
Private insurance86.8%
Public insurance16.8%
Uninsured under 195.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only7,66888.6%
Spanish2072.7%
Other Indo-European1702.2%
Asian & Pacific Islander140.2%
Other languages230.3%

Place of birth & citizenship

OriginCount%
Native born (US)8,10193.6%
Born in same state7,56187.4%
Born in different state1,17413.6%
Foreign born5406.2%
Naturalized citizen5546.4%
Not a US citizen31156.1%

Ancestry

AncestryCount%
French1,04812.1%
Italian7478.6%
Arab5005.8%
Polish4745.5%
AncestryCount%
English600.7%
Dutch220.3%
German50.1%
Irish40%

Technology access

Metric% of households
Computer access26.4%
Internet access98.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions
What ZIP codes does Fort Knox, KY have?
Fort Knox, KY has two ZIP codes: 40121 and 40122. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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