Main street of Coolidge on a Saturday afternoon during cotton harvest (ca. 1922–1953)
The area containing what is now the city of Coolidge was occupied by theHohokam, an indigenous ancientSonoran Desert people who built a massive compound consisting many ofcaliche structures and remained in the area for over 1,000 years. The only remaining and preserved structure from this compound is the Casa Grande Ruins National Monument.
The modern history of the city is centered around agriculture, particularly cotton. Coolidge was founded in 1925 when R.J. Jones laid out an 80 acres (32 ha) site during the construction of theCoolidge Dam on the nearbyGila River, which was completed in 1930. Both the dam and the townsite were named forCalvin Coolidge, the 30th President of the United States. The dam made the sandy soil native to the area into very richfarmland, and soon vast expanses of desert were plowed and acres of cotton were planted. This is when the area's status as the hub of the Arizona cotton industry was solidified and led to the incorporation of Coolidge as a city in 1945.[7]
According to theUnited States Census Bureau, the city has a total area of 83.653 square miles (216.66 km2), of which 83.473 square miles (216.19 km2) is land and 0.180 square miles (0.47 km2) (0.22%) is water.[2] It contains nomountains and is almost entirely flat, lying in a fertile valley located just south of the Gila River. TheSacaton Mountains are visible to the west, and the Picacho Mountains are visible to the southeast.
Coolidge features a hotdesert climate (Köppen climate classification BWh), typical of theSonoran Desert. Winters are characterized by abundantsunshine and are typically brief and mild, consisting of daytime highs in the 65 °F (18 °C) to 75 °F (24 °C) range. Lows are usually between 35 °F (2 °C) and 45 °F (7 °C), though severalfreezes occur annually. Rain is infrequent, occurring 2–3 days per month usually following the passage of acold front. The record low temperature for the city is 8 °F (−13 °C).
Summers are long and very hot, with temperatures of 100 °F (38 °C) to 110 °F (43 °C) almost daily from the end of May until September, with temperatures above 115 °F (46 °C) not uncommon. The record high temperature for the city is 123 °F (51 °C). Summertime lows are usually above 70 °F (21 °C), with occasional periods of lows above 80 °F (27 °C). Coolidge is affected by theNorth American Monsoon, which brings brief heavy downpours and gusty winds in the second half of summer. Severe events can sometimes causehaboobs andflash flooding.
According to realtor websiteZillow, the average price of a home as of June 30, 2025, in Coolidge is $276,260.[11]
As of the 2023American Community Survey, there are 4,935 estimated households in Coolidge with an average of 3.10 persons per household. The city has a median household income of $57,161. Approximately 22.2% of the city's population lives at or below thepoverty line. Coolidge has an estimated 62.2% employment rate, with 13.2% of the population holding a bachelor's degree or higher and 85.8% holding a high school diploma.[12]
The top five reported ancestries (people were allowed to report up to two ancestries, thus the figures will generally add to more than 100%) were English (69.2%), Spanish (28.4%), Indo-European (0.9%), Asian and Pacific Islander (0.2%), and Other (1.2%).
The median age in the city was 34.5 years.
Coolidge, Arizona – racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
As of the2020 census, there were 13,218 people, 4,399 households, 3,110 families residing in the city.[16] Thepopulation density was 173.31 inhabitants per square mile (66.9/km2). There were 4,871 housing units at an average density of 63.87 per square mile (24.7/km2). The racial makeup of the city was 51.14%White, 8.89%African American, 4.86%Native American, 0.95%Asian, 0.10%Pacific Islander, 16.92% from some other races and 17.14% from two or more races.Hispanic or Latino people of any race were 42.60% of the population.[17]
As of the2010 census, there were 11,825 people, 3,947 households, _ families residing in the city. The population density was 209.34 inhabitants per square mile (80.8/km2). There were 4,796 housing units at an average density of 84.90 per square mile (32.8/km2). The racial makeup of the city was 62.73%White, 7.85%African American, 5.67%Native American, 0.97%Asian, 0.11%Pacific Islander, 17.72% from some other races and 4.96% from two or more races.Hispanic or Latino people of any race were 41.96% of the population.
As of the2000 census, there were 7,786 people, 2,585 households, and 1,938 families residing in the city. The population density was 1,549.1 inhabitants per square mile (598.1/km2)}. There were 3,212 housing units at an average density of 639.1 per square mile (246.8/km2). The racial makeup of the city was 57.85%White, 8.30%African American, 5.63%Native American, 0.72%Asian, 0.05%Pacific Islander, 23.58% from some other races and 3.88% from two or more races.Hispanic or Latino people of any race were 39.20% of the population.
There were 2,585 households, out of which 38.5% had children under age 18 living with them, 48.8% weremarried 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.
In the city, the population was spread out, with 32.9% under age 18, 10.4% aged 18–24, 24.4% aged 25–44, 18.9% aged 45–64, and 13.4% who were aged 65 years 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. Theper capita income for the city was $13,663. About 20.9% of families and 24.7% of the population were below thepoverty line, including 30.9% of those under age 18 and 20.5% of those age 65 or over.
Until the 1950s, the city's economy was completely dependent on mining and cotton. It has since diversified to include manufacturing,regional trade, and services for agricultural producers and farm families.[18]
The city of Coolidge operates the Cotton Express, which provides local bus service.[21] The city of Coolidge also operates Central Arizona Regional Transit (CART), which provides transportation betweenFlorence, Coolidge,Central Arizona College andCasa Grande.[22]
The town was home toa station forAmtrak; it closed in June 1996.
TheCasa Grande Ruins are located at Ruins Drive in Coolidge, Az. Built by the Hohokam, the Casa Grande was abandoned around 1450 CE. 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
TheCoolidge 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.
HistoricCoolidge High School built in 1939 and NRHP eligible. The building now houses the offices of the Coolidge Unified School District No. 21.