2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Harrodsburg | 1 | 9,570 | 9,172 | 0.83% | 1,383 | 7 | City |
| Burgin | 2 | 1,025 | 982 | 0.79% | 816 | 1 | City |
Harrodsburg is the largest city in Mercer County, with a population of 9,570.
Burgin is the smallest city in Mercer County, with a population of 1,025.
There are 2 cities in Mercer County, Kentucky.