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Coolidge, Arizona
Original 1939 Coolidge High School
Original 1939 Coolidge High School
Location of Coolidge, Arizona
Location of Coolidge, Arizona
Country United States
State Arizona
County Pinal
Founded 1925
Incorporated 1945
 • Total 5 sq mi (13.0 km2)
 • Land 5 sq mi (13.0 km2)
 • Water 0 sq mi (0.0 km2)  0%
1,427 ft (435 m)
 • Total 11,825
 • Estimate 
 • Density 1,549.1/sq mi (597.7/km2)
Time zone UTC-7 (MST)
 • Summer (DST) no DST
ZIP code
Area code(s) 520
FIPS code 04-15500

Coolidge is a city in Pinal County, Arizona, United States. According to the 2010 census, the city's population is 11,825.

Coolidge is home of the Casa Grande Ruins National Monument. The monument was the first historic site to receive protected status by the United States Government in 1892. The ancient city was built about 1200 AD. by the Hohokam people.

Coolidge is home to Central Arizona College.


Coolidge was founded in 1925 and incorporated as a city in 1945. It is named for Calvin Coolidge, the 30th President of the United States.

The town was home to a station for Amtrak.


Coolidge is located at 32°58′38″N 111°31′23″W / 32.97722°N 111.52306°W / 32.97722; -111.52306 (32.977105, -111.522933). According to the United States Census Bureau, the city has a total area of 5.0 square miles (13 km2), all of it land.

Arizona Highway 87 and Arizona Highway 287 pass through the town. Coolidge is 56 miles (90 km) southeast of Phoenix, and 69 miles (111 km) northwest of Tucson. It is 21 miles (34 km) northeast of Casa Grande and 11 miles southwest of Florence. Picacho Reservoir is just 11 miles (18 km) south of town.


Historical population
Census Pop.
1960 4,990
1970 5,314 6.5%
1980 6,851 28.9%
1990 6,934 1.2%
2000 7,786 12.3%
2010 11,825 51.9%
Est. 2015 12,297 4.0%
U.S. Decennial Census
2014 Estimate

As of the census of 2000, there were 7,786 people, 2,585 households, and 1,938 families residing in the city. The population density was 1,549.1 people per square mile (597.7/km²). There were 3,212 housing units at an average density of 639.1 per square mile (246.6/km²). The racial makeup of the city was 57.85% White, 8.30% Black or African American, 5.63% Native American, 0.72% Asian, 0.05% Pacific Islander, 23.58% from other races, and 3.88% from two or more races. 39.20% of the population were Hispanic or Latino of any race.

There were 2,585 households out of which 38.5% had children under the age of 18 living with them, 48.8% were married couples living together, 19.3% had a female householder with no husband present, and 25.0% were non-families. 20.8% of all households were made up of individuals and 9.9% had someone living alone who was 65 years of age or older. The average household size was 3.00 and the average family size was 3.44.

Coolidge, Arizona. Main street of Coolidge on Saturday afternoon during cotton harvest. - NARA - 522056
Main street of Coolidge on a Saturday afternoon during cotton harvest (ca. 1922-1953)

In the city, the population was spread out with 32.9% under the age of 18, 10.4% from 18 to 24, 24.4% from 25 to 44, 18.9% from 45 to 64, and 13.4% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 93.2 males. For every 100 females age 18 and over, there were 88.1 males.

The median income for a household in the city was $29,049, and the median income for a family was $33,536. Males had a median income of $29,159 versus $21,472 for females. The per capita income for the city was $13,663. About 20.9% of families and 24.7% of the population were below the poverty line, including 30.9% of those under age 18 and 20.5% of those age 65 or over.

In 2010 Coolidge had a population of 11,825. The racial and ethnic composition of the population was 43.6% non-Hispanic white, 7.3% non-Hispanic black, 0.5% Hispanic blacks, 3.8% non-Hispanic Native American, 1.9% Hispanic or Latino Native American, 1.0% Asian, 0.1% Pacific Islander, 0.1% non-Hispanic from some other race, 5.0% from two or more races and 42.0% Hispanic or Latino.

Historic properties

Historic properties in Coolidge, Arizona
The Casa Grande Ruins are located at Ruins Drive in Coolidge, Az. Built by the Hohokam, the Casa Grande was abandoned around 1450 C.E. Written historic accounts of the Casa Grande begin with the journal entries of Padre Eusebio Francisco Kino when he visited the ruins in 1694. Listed in the National Register of Historic Places in 1966, and reference #66000192. 
Inside the Casa Grande Big House Ruins 
The Coolidge Woman's Club (Building) was built in 1925 and is located at 240 W. Pinkley Ave., Coolidge, Arizona. The building was listed in the National Register of Historic Places in 1990, reference #900015924. 
Historic Coolidge High School built in 1939 and NRHP eligible. The building now houses the offices of the Coolidge Unified School District #23. 
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