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zipcodes.pro — CITY/KY/FORT-KNOX

Fort Knox ZIP codes, Kentucky

Fort Knox, KY has 2 ZIP codes: 40121 and 40122. The largest is 40121.

USPS city name
2 ZIP codes
Population
8,836

Fort Knox in numbers

About 8,836 people live in Fort Knox, in 2,226 households. The median household income is $82,663 a year, 30% above the Kentucky median of $63,726 (US: $80,734). Median gross rent is $1,502 a month. The median age is 24.0; 48.3% of adults 25 and over hold a bachelor's degree or higher (27.6% across Kentucky); the average commute takes 12 minutes.

Population8,836Fort Knox8,836
Households2,226Fort Knox2,226
Median age24.0Fort Knox24.0Kentucky39.1US 38.9
Median household income$82,663Fort Knox$82,663Kentucky$63,726US $80,734
Median gross rent$1,502Fort Knox$1,502Kentucky$967US $1,413
Bachelor's degree or higher48.3%Fort Knox48.3%Kentucky27.6%US 35.7%
Mean commute12.4 minFort Knox12.4 minKentucky24.0 minUS 26.4 min
Population density436 / sq miFort Knox436 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Fort Knox CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Fort Knox

ZIP codes with the USPS city name Fort Knox
ZIP City Type Population Median income Median home
40121 Fort Knox , KY Standard 8,836 $82,663 —
40122 Fort Knox , KY No street area — — —

Map of Fort Knox ZIP codes

4012140122

The ZIP codes of Fort Knox, KY, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Fort Knox

The nearest larger towns are Radcliff (22,864 people, 5.2 mi), Elizabethtown (32,576 people, 14 mi) and Shepherdsville (14,533 people, 16 mi).

Towns near Fort Knox
TownPopulationDistance
Radcliff 22,864 5.2 mi
Vine Grove 6,830 5.6 mi
Brandenburg 2,937 13.7 mi
Elizabethtown 32,576 13.8 mi
Shepherdsville 14,533 15.7 mi
Hillview 8,797 18.9 mi
Pioneer Village 2,723 19.4 mi
Shively 15,638 22.8 mi
Corydon, IN 3,157 23.8 mi
Mount Washington 18,480 24.7 mi
Louisville/Jefferson County metro government 631,818 25.7 mi
Hodgenville 3,389 26.1 mi
Georgetown, IN 3,800 28.1 mi
Bardstown 13,804 28.4 mi

More nearby: every ZIP code in Hardin County · Kentucky ZIP codes

Cite this page

zipcodes.pro. “Fort Knox, KY ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ky/fort-knox

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