3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Naples | 1 | 20,683 | 19,137 | 1.26% | 1,681 | 12 | City |
| Marco Island | 2 | 16,949 | 15,764 | 1.18% | 1,394 | 12 | City |
| Everglades | 3 | 415 | 358 | 2.47% | 454 | 1 | City |
Naples is the largest city in Collier County, with a population of 20,683.
Everglades is the smallest city in Collier County, with a population of 415.
There are 3 cities in Collier County, Florida.