3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lake Butler | 1 | 1,985 | 1,978 | 0.05% | 842 | 2 | City |
| Worthington Springs | 2 | 381 | 377 | 0.26% | 397 | 1 | Town |
| Raiford | 3 | 227 | 218 | 0.89% | 417 | 1 | Town |
Lake Butler is the largest city in Union County, with a population of 1,985.
Raiford is the smallest city in Union County, with a population of 227.
There are 3 cities in Union County, Florida.