Pinal County is a county in the central part of the U.S. state of Arizona. According to U.S. Census Bureau estimates in 2018, the population of the county was 447,138, making it Arizona’s third-most populous county. The county seat is Florence. The county was founded in 1875.
According to the U.S. Census Bureau, the county has a total area of 5,374 square miles (13,920 km), of which 5,366 square miles (13,900 km) is land and 8.6 square miles (22 km) (0.2%) is water.
As of the 2000 census, there were 179,727 people, 61,364 households, and 45,225 families residing in the county. The population density was 34 people per square mile (13/km). There were 81,154 housing units at an average density of 15/sq mi (6/km). The racial makeup of the county was 70.42% White, 2.76% Black or African American, 7.81% Native American, 0.60% Asian, 0.08% Pacific Islander, 15.66% from other races, and 2.67% from two or more races. 29.86% of the population were Hispanic or Latino of any race. 21.86% reported speaking Spanish at home, while 1.44% speak O’odham and 0.02% speak Apache.
There were 61,364 households out of which 29.80% had children under the age of 18 living with them, 56.90% were married couples living together, 11.50% had a female householder with no husband present, and 26.30% were non-families. 21.10% of all households were made up of individuals and 9.20% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.09.
In the county, the population was spread out with 25.10% under the age of 18, 8.70% from 18 to 24, 27.30% from 25 to 44, 22.70% from 45 to 64, and 16.20% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 114.20 males. For every 100 females age 18 and over, there were 117.00 males.
The median income for a household in the county was $35,856, and the median income for a family was $39,548. Males had a median income of $31,544 versus $23,726 for females. The per capita income for the county was $16,025. About 12.10% of families and 16.90% of the population were below the poverty threshold, including 25.50% of those under age 18 and 8.70% of those age 65 or over.
As of the 2010 census, there were 375,770 people, 125,590 households, and 92,157 families residing in the county. The population density was 70.0 inhabitants per square mile (27.0/km). There were 159,222 housing units at an average density of 29.7 per square mile (11.5/km). The racial makeup of the county was 72.4% white, 5.6% American Indian, 4.6% black or African American, 1.7% Asian, 0.4% Pacific islander, 11.5% from other races, and 3.8% from two or more races. Those of Hispanic or Latino origin made up 28.5% of the population. In terms of ancestry, 16.9% were German, 10.6% were Irish, 9.5% were English, and 2.8% were American.
Of the 125,590 households, 37.0% had children under the age of 18 living with them, 55.8% were married couples living together, 11.7% had a female householder with no husband present, 26.6% were non-families, and 20.5% of all households were made up of individuals. The average household size was 2.78 and the average family size was 3.21. The median age was 35.3 years.
The median income for a household in the county was $51,310 and the median income for a family was $56,299. Males had a median income of $45,082 versus $34,785 for females. The per capita income for the county was $21,716. About 10.1% of families and 13.5% of the population were below the poverty line, including 18.3% of those under age 18 and 7.6% of those age 65 or over.