Casa Grande, Arizona is a city located in Pinal County. It is the largest city in the county and is home to over 50, 000 people. The name CASA Grande comes from the Spanish word for 'big house' and is derived from a large four-story structure built by the ancient Sonoran Desert people. The city is known for its rich history, outdoor activities, and cultural attractions. CASA Grande is also home to the CASA Grande Ruins National Monument, which is a preserved archaeological site of the Hohokam people.