| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakeland | 1 | 128,276 | 113,862 | 2.2% | 1,927 | 67 | City |
| Winter Haven | 2 | 64,648 | 50,692 | 3.75% | 1,938 | 33 | City |
| Haines City | 3 | 49,457 | 27,873 | 7.58% | 2,072 | 24 | City |
| Bartow | 4 | 24,246 | 19,689 | 2.66% | 519 | 47 | City |
| Auburndale | 5 | 22,590 | 15,722 | 5.71% | 1,666 | 14 | City |
| Davenport | 6 | 19,859 | 9,684 | 9.66% | 4,515 | 4 | City |
| Lake Wales | 7 | 19,025 | 16,285 | 2.01% | 937 | 20 | City |
| Lake Alfred | 8 | 10,630 | 6,541 | 5.17% | 506 | 21 | City |
| Eagle Lake | 9 | 7,039 | 3,066 | 9.73% | 2,710 | 3 | City |
| Dundee | 10 | 6,676 | 5,268 | 3.92% | 598 | 11 | Town |
| Fort Meade | 11 | 5,437 | 5,083 | 1.08% | 664 | 8 | City |
| Mulberry | 12 | 4,701 | 3,961 | 2.8% | 692 | 7 | City |
| Frostproof | 13 | 3,580 | 3,214 | 1.73% | 307 | 12 | City |
| Polk City | 14 | 3,159 | 2,774 | 2.5% | 701 | 5 | Town |
| Lake Hamilton | 15 | 3,149 | 1,557 | 4.72% | 667 | 5 | Town |
| Hillcrest Heights | 16 | 292 | 249 | 2.82% | 1,825 | 0 | Town |
Lakeland is the largest city in Polk County, with a population of 128,276.
Hillcrest Heights is the smallest city in Polk County, with a population of 292.
There are 16 cities in Polk County, Florida.