Maricopa is a city in the Gila River Valley in Arizona. With an estimated 50,024 residents as of 2018, Maricopa is the second most populous incorporated city in Pinal County and eighteenth most populous in Arizona. Maricopa forms part of the Phoenix metropolitan area.
As of the census of 2010, there were 43,482 people, 14,359 households, and 11,110 families residing in the city. The population density was 1,356.8 people per square mile (526.4/km). There were 17,240 housing units at an average density of 540.4 per square mile (208.7/km). The racial makeup of the city was 70.2% White, 9.7% Black or African American, 2.0% Native American, 4.1% Asian, 0.3% Pacific Islander, 8.5% from other races, and 5.3% from two or more races. 24.4% of the population is Hispanic or Latino of any race.
There were 14,359 households out of which 47.1% had children under the age of 18 living with them, 37.5% were married couples living together, 10.9% had a female householder with no husband present, and 22.6% were non-families. 15.6% of all households were made up of individuals and 2.5% had someone living alone who was 65 years of age or older. The average household size was 3.03 and the average family size was 3.38.
In the city, the population was spread out with 32.5% under the age of 18, 6.2% from 18 to 24, 35% from 25 to 44, 19.8% from 45 to 64, and 6.5% who were 65 years of age or older. The median age was 31.2 years. For every 100 females, there were 98.5 males. For every 100 females age 18 and over, there were 94.8 males.
According to 2009 Census Bureau estimates, the median income for a household in the city was $67,692, and the median income for a family was $69,818. The per capita income for the city was $27,618. About 3.7% of families and 5.2% of the population were below the poverty line.