6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Elizabethtown | 1 | 36,141 | 31,412 | 2.23% | 1,276 | 28 | City |
| Radcliff | 2 | 22,547 | 23,023 | -0.35% | 1,688 | 13 | City |
| Vine Grove | 3 | 7,094 | 6,611 | 1.16% | 1,033 | 7 | City |
| West Point | 4 | 888 | 950 | -1.11% | 333 | 3 | City |
| Upton | 5 | 701 | 707 | -0.14% | 516 | 1 | City |
| Sonora | 6 | 557 | 583 | -0.71% | 295 | 2 | City |
Elizabethtown is the largest city in Hardin County, with a population of 36,141.
Sonora is the smallest city in Hardin County, with a population of 557.
There are 6 cities in Hardin County, Kentucky.