Tempe is a city in Maricopa County, Arizona, USA, with a 2008 population of 175,523. The city is named after the Vale of Tempe in Greece. Tempe is located in the East Valley section of metropolitan Phoenix; it is bordered by Phoenix and Guadalupe on the west, Scottsdale on the north, Chandler on the south, and Mesa on the east. Tempe is the location of US Airways Group's corporate headquarters, and of Arizona State University's oldest and largest "Tempe" campus.