5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tucson | 1 | 556,854 | 542,649 | 0.51% | 2,293 | 243 | City |
| Marana | 2 | 64,818 | 52,626 | 3.91% | 532 | 122 | Town |
| Oro Valley | 3 | 49,262 | 47,226 | 0.83% | 1,405 | 35 | Town |
| Sahuarita | 4 | 38,221 | 34,356 | 2.06% | 1,206 | 32 | Town |
| South Tucson | 5 | 4,514 | 4,616 | -0.46% | 4,395 | 1 | City |
Tucson is the largest city in Pima County, with a population of 556,854.
South Tucson is the smallest city in Pima County, with a population of 4,514.
There are 5 cities in Pima County, Arizona.