16 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakeland | 1 | 130,544 | 113,881 | 2.17% | 1,961 | 67 | City |
| Winter Haven | 2 | 64,661 | 50,603 | 3.76% | 1,938 | 33 | City |
| Haines City | 3 | 49,135 | 27,949 | 7.74% | 2,059 | 24 | City |
| Bartow | 4 | 23,339 | 19,574 | 2.77% | 499 | 47 | City |
| Auburndale | 5 | 23,117 | 15,742 | 5.61% | 1,705 | 14 | City |
| Davenport | 6 | 20,281 | 9,730 | 9.5% | 4,611 | 4 | City |
| Lake Wales | 7 | 18,552 | 16,290 | 2.07% | 914 | 20 | City |
| Lake Alfred | 8 | 9,678 | 6,539 | 5.71% | 461 | 21 | City |
| Eagle Lake | 9 | 6,836 | 3,055 | 10.15% | 2,632 | 3 | City |
| Dundee | 10 | 6,776 | 5,273 | 3.85% | 607 | 11 | Town |
| Fort Meade | 11 | 5,461 | 5,101 | 1.11% | 667 | 8 | City |
| Mulberry | 12 | 4,750 | 3,964 | 2.84% | 699 | 7 | City |
| Frostproof | 13 | 3,593 | 3,214 | 1.78% | 308 | 12 | City |
| Polk City | 14 | 3,228 | 2,772 | 2.41% | 717 | 5 | Town |
| Lake Hamilton | 15 | 2,413 | 1,552 | 6.35% | 511 | 5 | Town |
| Hillcrest Heights | 16 | 298 | 250 | 2.76% | 1,863 | 0 | Town |
Lakeland is the largest city in Polk County, with a population of 130,544.
Hillcrest Heights is the smallest city in Polk County, with a population of 298.
There are 16 cities in Polk County, Florida.