| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Harrodsburg | 1 | 9,655 | 9,173 | 0.82% | 1,395 | 7 | City |
| Burgin | 2 | 1,035 | 982 | 0.78% | 824 | 1 | City |
Harrodsburg is the largest city in Mercer County, with a population of 9,655.
Burgin is the smallest city in Mercer County, with a population of 1,035.
There are 2 cities in Mercer County, Kentucky.