Mesa is a city in Maricopa County and is the most populous city in the East Valley section of metro Phoenix. It is bordered by Tempe on the west, the Salt River Pima-Maricopa Indian Community on the North, Chandler and Gilbert on the south and Apache Juntion on the east. Mesa is the third-largest city in Arizona after Phoenix and Tucson. The last census shows Mesa is home to just over 504,000 residents. Mesa has been described as America’s most conservative city.