Maricopa County, Arizona
Located in Arizona, Maricopa County has a population of 4,559,748 residents and a median age of 37.6 years, making it the #4 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.0%. The median home value is $452,800, and the median household income is $89,300, which is 19% above the national median.
Demographics
Maricopa County has a population of 4,559,748, making it the #4 most populous county in the US. The median age is 37.6 years, which is 3.3% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Maricopa County is $89,300, ranking #317 out of 3,222 counties — 18.8% above the national median. The poverty rate is 11.0% and unemployment stands at 4.5%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Maricopa County is $452,800 (+60.6% vs national). Renters pay a median of $1,708/mo and the homeownership rate is 65.2%.
Median Home Value Trend
Rankings →Household Type
Education
In Maricopa County, 36.7% of adults age 25+ hold a bachelor's degree or higher, which is 8.8% above the national average, ranking #393 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Maricopa County is 77.5 years. 17.1% of adults report poor or fair health and 12.5% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
11.8% of adults in Maricopa County smoke , 32.7% are obese , and 19.7% report excessive drinking. The drug overdose death rate is 36.6 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Maricopa County is 6.6 per 100,000 and the suicide rate is 16.0 per 100,000. Motor vehicle deaths occur at a rate of 12.7 per 100,000.
Homicide Rate Trend
Families & Children
13.9% of children in Maricopa County live in poverty and the infant mortality rate is 5.4 per 1,000 live births. The teen birth rate is 16.1 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Maricopa County is 68.6%. The mean commute time is 28.5 min, which is 3.4% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Maricopa County voted Republican with a margin of 3.5%. The vote was 47.7% Dem / 51.2% Rep. Compared to 2020, the margin shifted 5.7 toward Republicans .
Vote Share Over Time
About Maricopa County, Arizona
Maricopa County, Arizona has a total population of 4,559,748, making it the 4th most populous county in the United States. The median age in Maricopa County is 37.6 years, which is 3.3% below the national median of 38.9 years.
The median household income in Maricopa County is $89,300, which ranks #317 of 3,222 counties nationwide. This is 18.8% above the national median of $75,149. The poverty rate is 11.0%, lower than the national rate of 12.6%. The unemployment rate stands at 4.5%.
The median home value in Maricopa County is $452,800, 60.6% above the national median. Renters in Maricopa County pay a median gross rent of $1,708 per month. The homeownership rate is 65.2%, compared to the national rate of 64.4%.
In Maricopa County, 36.7% of residents aged 25 and older hold a bachelor's degree or higher, 8.8% above the national average of 33.7%. Health insurance coverage stands at 89.4% of the population. The average commute time for workers is 28.5 min.
Maricopa County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 52.5% of the population, followed by Hispanic or Latino (31.2%) and Black (non-Hispanic) (5.4%).
All data for Maricopa County, Arizona comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.