How many people live in Maricopa County, AZ?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 4.67 million people living in Maricopa County, AZ. That makes Maricopa County the fourth-most populous county in the US. It is also the largest in Arizona, accounting for 61.3% of the state’s population.
4.67M
population of Maricopa County, AZ (2024)
61.3%
County share of the Arizona population (2024)
About 4.67 million people lived in Maricopa County, AZ in 2024.
Population estimates, 2000–2024
What are Maricopa County, AZ’s age demographics?
About 789,700 Maricopa County residents are aged 65 and older in 2024. That represents 16.9% of its population. For comparison, the age group represents 19.7% of Arizona’s population and 18% in the US overall.
Another 1.01 million Maricopa County residents, or 21.7% 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 Maricopa County, AZ's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Maricopa County, AZ’s racial and ethnic demographics?
Hispanic residents make up 31.9% of the Maricopa County population, higher than the national share of 20%. Maricopa County also has a larger share of people identifying as non-Hispanic two or more races (2.6%) than the US overall (2.5%).
In contrast, Maricopa County’s non-Hispanic Black or African American population accounts for 6.2%, below the 12.6% nationwide, and the non-Hispanic white population makes up 52.1% 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.
Maricopa County, AZ has a higher share of a non-Hispanic Black or African American population than Arizona as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Maricopa County, AZ is Phoenix with about 1.67 million residents in 2024.
Cities and towns in Maricopa County, AZ ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Phoenix | 1,673,164 |
| 2. | Mesa | 517,151 |
| 3. | Gilbert | 288,790 |
| 4. | Chandler | 281,231 |
| 5. | Glendale | 258,143 |
| 6. | Scottsdale | 246,170 |
| 7. | Peoria (pt.) | 199,924 |
| 8. | Tempe | 190,114 |
| 9. | Surprise | 167,564 |
| 10. | Goodyear | 118,186 |
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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.
