ZIP code
40121
Fort Knox, KY
40121 covers Fort Knox in Hardin County, with 8,715 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 40121. Methodology
ZIP code map of 40121
About ZIP code 40121
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 40121. Not ACS. Methodology
People in 40121
Race
- White4,439
- Black or African American1,402
- American Indian or Alaska Native62
- Asian261
- Native Hawaiian and Pacific Islander125
- Other race475
- Two or more races985
Hispanic or Latino (any race): 1,386
Age
- Under 101,541
- 10 to 191,385
- 20 to 291,851
- 30 to 391,418
- 40 to 49873
- 50 to 59392
- 60 to 69173
- 70 to 7975
- 80 and older41
Income and housing in 40121
Education
- High school graduate95.7%
- Bachelor's degree42.1%
- Graduate degree15.9%
Places covering 40121
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Hardin County72.3%
- Meade County27.7%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
0.1% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 40121
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 8,236 | |
| 2006 | 7,977 | |
| 2007 | 7,851 | |
| 2008 | 8,090 | |
| 2009 | 9,872 | |
| 2010 | 8,690 | |
| 2011 | 11,308 | 8,016 |
| 2012 | 10,946 | 8,450 |
| 2013 | 10,555 | 7,540 |
| 2014 | 10,271 | 6,260 |
| 2015 | 9,449 | 6,460 |
| 2016 | 9,226 | 6,840 |
| 2017 | 9,092 | 7,180 |
| 2018 | 8,965 | 7,060 |
| 2019 | 8,695 | 6,980 |
| 2020 | 8,865 | 6,630 |
| 2021 | 8,916 | 6,410 |
| 2022 | 8,655 | 6,450 |
| 2023 | 8,715 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 40121
12 nearest ZIP centroids (any distance)
- 40155Muldraugh2.4 miPop 1,164 · Income $47,059
- 40122Fort Knox2.5 miPop — · Income —
- 40177West Point5.6 miPop 1,627 · Income $47,500
- 40160Radcliff8.0 miPop 23,205 · Income $59,293
- 40117Ekron9.2 miPop 2,089 · Income $56,791
- 40175Vine Grove10.3 miPop 16,283 · Income $75,156
- 47135Laconia10.5 miPop 1,063 · Income $55,804
- 40272Louisville12.0 miPop 37,595 · Income $66,382
- 40108Brandenburg12.0 miPop 12,469 · Income $71,480
- 47117Elizabeth12.4 miPop 4,352 · Income $88,648
- 40162Rineyville13.2 miPop 5,821 · Income $81,466
- 40142Guston13.5 miPop 2,213 · Income $78,714
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 40121, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 40121 FAQ
- What city is ZIP code 40121 in?
- 40121 is in Fort Knox, KY.
- What county is 40121 in?
- 40121 is in Hardin County.
- What is the median household income in 40121?
- The median household income in 40121 is $74,224.
- Which ZIP codes are near 40121?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 40121.