| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Naples | 1 | 20,381 | 19,146 | 1.33% | 1,657 | 12 | City |
| Marco Island | 2 | 16,621 | 15,764 | 1.22% | 1,367 | 12 | City |
| Everglades | 3 | 408 | 360 | 2.26% | 446 | 1 | City |
Naples is the largest city in Collier County, with a population of 20,381.
Everglades is the smallest city in Collier County, with a population of 408.
There are 3 cities in Collier County, Florida.