Fort Knox, KY ZIP Codes
One ZIP code serves Fort Knox, Kentucky: 40121. Together they are home to 8,836 residents in 2,226 households.
Fort Knox Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 8,836 |
| Households | 2,226 |
| Median household income | $82,663 |
| Median home value | not published |
| Median age | 24 |
| Median rent | $1,502 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 8,836 |
| Households (sum of ZIP codes) | 2,226 |
| Median household income, range across ZIP codes | $82,663 (40121) to $82,663 (40121) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $82,663 |
| Homeowners | 0.0% |
| Households with kids under 18 | 61.1% |
| Moved in the past year | 34.3% |
| Carrier routes in EDDM2GO's route library | 5 routes, 2,757 homes (1 of 1 ZIP codes) |
Every ZIP code in Fort Knox
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 40121 | Fort Knox | 8,836 | 2,226 | $82,663 | — | 0.0% | 61.1% | 34.3% | 5 | 2,768 | 42% of its land; mailing city |
A ZIP code is listed for Fort Knox when at least 10% of its land lies inside the Fort Knox Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Fort Knox. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Fort Knox.
Counties
- Hardin County — 13 ZIP codes
Price a mailing to Fort Knox ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Fort Knox, KY?
- 40121. A ZIP code is listed for Fort Knox when at least 10% of its land lies inside the Fort Knox Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Fort Knox.
- What is the population of Fort Knox, KY?
- The Census Bureau counts 8,836 residents inside Fort Knox Census-designated place (ACS 2020–2024). The 1 ZIP code that serve Fort Knox hold 8,836 residents in all.
- What is the median household income in Fort Knox, KY?
- $82,663 inside Fort Knox Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $82,663 to $82,663.
- How many carrier routes and mailboxes are in Fort Knox, KY?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 5 carrier routes reaching 2,757 residential and 11 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.