How many people live in Pima County, AZ?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 1.08 million people living in Pima County, AZ. That makes Pima County the 45th-most populous county in the US. It is also the second-largest in Arizona, accounting for 14.2% of the state’s population.
1.08M
population of Pima County, AZ (2024)
14.2%
County share of the Arizona population (2024)
About 1.08 million people lived in Pima County, AZ in 2024.
Population estimates, 2000–2024
What are Pima County, AZ’s age demographics?
About 241,700 Pima County, AZ residents are aged 65 and older in 2024. That represents 22.4% of its population. For comparison, the age group represents 19.7% of Arizona’s population and 18% in the US overall.
Another 205,400 Pima County residents, or 19% of the population, were children under 18. For comparison, the age group represents 21% of Arizona’s population and 21.6% in the US overall.
A higher share of Pima County, AZ's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Pima County, AZ’s racial and ethnic demographics?
Hispanic residents make up 37% of the Pima County, AZ population, higher than the national share of 20%. Pima County, AZ also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (2.5%) than the US overall (0.72%).
In contrast, Pima County’s non-Hispanic Black or African American population accounts for 3.9%, below the 12.6% nationwide, and the non-Hispanic white population makes up 50.6% of the county, compared with 57.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Pima County, AZ has a higher share of a Hispanic population than Arizona as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Pima County, AZ is Tucson with about 554,000 residents in 2024.
Cities and towns in Pima County, AZ ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Tucson | 554,013 |
| 2. | Marana (pt.) | 62,380 |
| 3. | Oro Valley | 48,855 |
| 4. | Sahuarita | 37,448 |
| 5. | South Tucson | 4,535 |
| 6. | Balance of Pima County | 372,918 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
