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is a rapidly growing city in Pinal County, approximately halfway between Phoenix and Tucson in the U.S. state of Arizona. According to 2007 Census Bureau estimates, the population of the city is 38,134, making it the largest in Pinal County. It is named after the Casa Grande Ruins National Monument, which is actually located in Coolidge.
Casa Grande was founded in 1879 during the Arizona mining boom and became Incorporated in 1915. It was named after the Hohokam ruins at the nearby Casa Grande Ruins National Monument.
A major railroad terminated in Casa Grande, which was originally named "Terminus".
One of the founding fathers of Casa Grande was Thompson Rodney Peart. Peart Road, Peart Park, and the Peart Center, all of which are notable fixtures of Casa Grande, are named after him.
Casa Grande is home to Francisco Grande Hotel & Golf Resort, former spring training location for the San Francisco Giants. Then owner, Horace Stoneham, began developing the property in 1959. The first exhibition game was played in Casa Grande in 1961, with Willie Mays hitting a home run. The San Francisco Giants no longer play at Francisco Grande, but the pool remains in a baseball bat and ball shape in memory of the past ballgames.