Chandler is a city in Maricopa County, Arizona, United States, and a suburb in the Phoenix-Mesa-Chandler Metropolitan Statistical Area. I…Chandler is a city in Maricopa County, Arizona, United States, and a suburb in the Phoenix-Mesa-Chandler Metropolitan Statistical Area. It is the fourth-most populous city in Arizona, after Mesa, Tucson, and Phoenix. Chandler is considered to be a part of the East Valley.