| Zip Code | City | Population ↓ |
|---|---|---|
| 33810 | Lakeland | 51,427 |
| 33844 | Haines City | 45,765 |
| 33880 | Winter Haven | 43,732 |
| 33837 | Davenport | 39,979 |
| 34759 | Kissimmee | 39,528 |
| 33881 | Winter Haven | 38,946 |
| 33813 | Lakeland | 37,582 |
| 33823 | Auburndale | 37,082 |
| 33884 | Winter Haven | 36,058 |
| 33801 | Lakeland | 33,861 |
| 33809 | Lakeland | 30,897 |
| 33830 | Bartow | 30,396 |
| 33803 | Lakeland | 30,230 |
| 33897 | Davenport | 28,083 |
| 33860 | Mulberry | 26,658 |
| 33805 | Lakeland | 26,064 |
| 33811 | Lakeland | 25,886 |
| 33898 | Lake Wales | 17,066 |
| 33812 | Lakeland | 14,736 |
| 33815 | Lakeland | 13,644 |
| 33868 | Polk City | 13,404 |
| 33853 | Lake Wales | 12,241 |
| 33859 | Lake Wales | 11,081 |
| 33843 | Frostproof | 10,790 |
| 33850 | Lake Alfred | 8,876 |
| 33841 | Fort Meade | 8,440 |
| 33838 | Dundee | 5,226 |
| 33839 | Eagle Lake | 3,649 |
| 33827 | Babson Park | 2,513 |
| 33851 | Lake Hamilton | 988 |
| 33849 | Kathleen | 713 |
| 33858 | Loughman | 573 |
| 33854 | Lakeshore | 446 |
| 33847 | Homeland | 374 |
| 33856 | Nalcrest | 297 |
| 33877 | Waverly | 269 |
| 33855 | Indian Lake Estates | 126 |
| 33867 | River Ranch | 76 |
| 33835 | Bradley | 57 |
| 33840 | Eaton Park | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 40 ZCTAs in Polk County, Florida (US Census).