7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lenoir City | 1 | 12,834 | 10,134 | 4.39% | 1,488 | 8.63 | City |
| Loudon | 2 | 7,070 | 6,025 | 3.05% | 559 | 12.65 | City |
| Tellico Village | 3 | 6,332 | 5,314 | 0.57% | 849 | 7.46 | CDP |
| Greenback | 4 | 1,252 | 1,107 | 2.37% | 151 | 8.31 | City |
| Rarity Bay | 5 | 984 | 641 | 7.19% | 540 | 1.82 | CDP |
| Philadelphia | 6 | 699 | 608 | 2.64% | 450 | 1.55 | City |
| Kahite | 7 | 661 | 667 | 7.13% | 508 | 1.30 | CDP |
Lenoir City is the largest city in Loudon County, with a population of 12,834.
Kahite is the smallest city in Loudon County.
There are 7 cities in Loudon County, Tennessee.