According to the U.S. Census of 2000, the city has a total area of 98.9 square miles (256 km2). The city offers a varied range of community facilities for its citizens. Outside the city limits, the city has a planning area of almost 560 square miles (1,500 km2).
As of the census of 2011, there were 16,964 people, 2,492 households, and 1,988 families residing in Eloy. The population density was 144.8 people per square mile (55.9/km²). There were 2,734 housing units at an average density of 38.1 per square mile (14.7/km²). The racial makeup of the city was 58% Hispanic or Latino, 5.32% Black or African American, 41% White, 4.48% Native American, 1.20% Asian, 0.11% Pacific Islander, 31.48% from other races, and 4.71% from two or more races.
There were 2,492 households out of which 50.1% had children under the age of 18 living with them, 49.4% were married couples living together, 21.9% had a female householder with no husband present, and 20.2% were non-families. 15.5% of all households were made up of individuals and 6.3% had someone living alone who was 65 years of age or older. The average household size was 3.57 and the average family size was 3.94.
In the city, the population was spread out with 33.7% under the age of 18, 12.0% from 18 to 24, 32.5% from 25 to 44, 15.4% from 45 to 64, and 6.4% who were 65 years of age or older. The median age was 28 years. For every 100 females there were 137.1 males. For every 100 females age 18 and over, there were 154.8 males.
The median income for a household in the city was $26,518, and the median income for a family was $28,494. Males had a median income of $25,295 versus $21,088 for females. The per capita income for the city was $9,194. About 27.9% of families and 31.9% of the population were below the poverty line, including 35.6% of those under age 18 and 24.6% of those age 65 or over.
The largest employer is Corrections Corporation of America (CCA), and those CCA prisoners are included in the census. CCA operates the Eloy Detention Center (opened 1994), the Red Rock Correctional Center (opened 2006), the Saguaro Correctional Center (opened 2007), and the La Palma Correctional Center (opened 2008).
As of 2010 the CCA-operated Saguaro Correctional Center, located in Eloy, houses the majority of Hawaii's male prison inmate population.
It is also home to the world's largest skydive dropzone, Skydive Arizona, and bills itself as the skydiving capital of the world.
According to Eloy's 2014 Comprehensive Annual Financial Report, the top employers in the city are:
The Eloy Elementary School District provides elementary education in grades K through 8 through its four schools:Curiel Annex School (preschool and kindergarten)
Curiel Primary School (grades 1 through 3)
Eloy Intermediate School (grades 4 through 6)
Eloy Junior High School (grades 7 and 8)
The one high school in the town, Santa Cruz Valley Union High School, is separately administered. It has about 440 students.Levi Jones – professional football player
Mossy Cade – professional football player