Tempe ( tem-PEE; Oidbaḍ in O'odham), is a city in Maricopa County, Arizona, United States, with the Census Bureau reporting a 2019 population of 195,805. 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 and the Salt River Pima–Maricopa Indian Community 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.
The Hohokam lived in this area and built canals to support their agriculture. They abandoned their settlements during the 15th century, with a few individuals and families remaining nearby.
Fort McDowell was established approximately 25 mi (40 km) northeast of present downtown Tempe on the upper Salt River in 1865 allowing for new towns to be built farther down the Salt River. US military service members and Hispanic workers were hired to grow food and animal feed to supply the fort, and less than a year later, had set up small camps near the river that were the first permanent communities in the Valley after the fall of the Hohokam. (Phoenix was settled shortly afterward, by 1867–68.) The two settlements were 'Hayden's Ferry', named after a ferry service operated by Charles T. Hayden, and 'San Pablo', and were located west and east of Hayden Butte respectively. The ferry became the key river crossing in the area.