| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tucson | 1 | 550,374 | 542,621 | 0.37% | 2,266 | 243 | City |
| Marana | 2 | 67,860 | 52,625 | 3.57% | 557 | 122 | Town |
| Oro Valley | 3 | 48,414 | 47,218 | 0.68% | 1,381 | 35 | Town |
| Sahuarita | 4 | 38,406 | 34,351 | 1.89% | 1,212 | 32 | Town |
| South Tucson | 5 | 4,424 | 4,616 | -0.63% | 4,308 | 1 | City |
Tucson is the largest city in Pima County, with a population of 550,374.
South Tucson is the smallest city in Pima County, with a population of 4,424.
There are 5 cities in Pima County, Arizona.