Fort Knox, KY ZIP codes
Fort Knox (also written Ft. Knox), Kentucky has 2 ZIP codes, including 1 PO Box ZIP. They are in Hardin County.
- Population in these ZIPs
- 8,836
- Avg. median income
- $82,700population-weighted
- Typical home value
- —population-weighted
- Metro area
- Elizabethtown, KY
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Fort Knox, KY ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 40121 | Hardin County | 8,836 | $82,663 | — |
| 40122 PO Box | Hardin County | — | — | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Fort Knox
- Muldraugh 3 mi
- West Point 7 mi
- Ekron 9 mi
- Vine Grove 9 mi
- Radcliff 10 mi
- Rineyville 12 mi
- Brandenburg 12 mi
- Guston 13 mi
- Shepherdsville 15 mi
- Lebanon Junction 16 mi
- Brooks 16 mi
- Elizabethtown 16 mi
Frequently asked questions
What county is Fort Knox, Kentucky in?
Fort Knox ZIP codes are in Hardin County.
Which Fort Knox ZIP codes are PO Boxes?
40122 is a PO Box or single-organization ZIP code; it has no residential delivery area.