Tempe, also known as Hayden's Ferry during the territorial times of Arizona, is a city in Maricopa County, Arizona, United States, with the Census Bureau reporting a 2010 population of 161,719. 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 also the location of the main campus of Arizona State University.