Maricopa County, Arizona Age & Gender Distribution (2024)
Population distribution by age and gender for Maricopa County, Arizona
Maricopa County, Arizona Age & Gender Statistics (2024)
Total Population
4,559,748
Median Age
37.6
Male Median
36.7
Female Median
38.7
Maricopa County, Arizona Population Growth

Maricopa County, Arizona Demographic Trend
Since 2010, the population of has changed by +21.5%%.
+21.5%% Growth
Maricopa County, Arizona Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Maricopa County, Arizona Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 37.6 | 4,559,748 |
| 2023 | 37.5 | 4,491,987 |
| 2022 | 37.1 | 4,430,871 |
| 2021 | 36.9 | 4,367,186 |
| 2020 | 36.6 | 4,412,779 |
| 2019 | 36.4 | 4,328,810 |
| 2018 | 36.1 | 4,253,913 |
| 2017 | 36.0 | 4,155,501 |
| 2016 | 35.8 | 4,088,549 |
| 2015 | 35.6 | 4,018,143 |
| 2014 | 35.3 | 3,947,382 |
| 2013 | 35.0 | 3,889,161 |
| 2012 | 34.6 | 3,841,819 |
| 2011 | 34.4 | 3,798,374 |
| 2010 | 34.1 | 3,751,410 |
Maricopa County, Arizona Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.6% |
| 5–17 | 16.8% |
| 18–24 | 9.2% |
| 25–34 | 14.6% |
| 35–54 | 25.7% |
| 55–64 | 11.7% |
| 65+ | 16.3% |
Dependency Ratios for Maricopa County, Arizona
- Total Dependency Ratio:
- 63.3
- Youth Dependency:
- 36.7
- Old-Age Dependency:
- 26.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Maricopa County, Arizona
The median age in Maricopa County, Arizona is 37.6 years.
According to latest Census data, the total population of Maricopa County, Arizona is 4,559,748.
In Maricopa County, Arizona, seniors (ages 65+) make up 16.3% of the population, while children under 18 represent 16.8%.
Based on historical data since 2010, the population in Maricopa County, Arizona is aging.