About Kingman, AZ: Kingman, AZ is a city in northwestern Arizona, founded in the 1880s and named after surveyor Louis Kingman. It is the county seat of Mohave County and is known as the "Heart of Historic Route 66". The city is situated in the Hualapai Valley and is a regional hub for industry, commerce, and tourism, with a strategic location on both Interstate 40 and U.S. 93.