Kearny is a town in Pinal County, Arizona, United States. The town was named after General Stephen Watts Kearny, who passed through the area on November 7, 1846, while leading 100 dragoons to California. According to the 2010 census, the population of the town is 1,950. The economic base of Kearny and nearby towns is the Ray mine and Hayden Smelter, both owned and operated by ASARCO.

Pinal County is in the central part of the U.S. state of Arizona. According to the 2020 census, the population of the county was 425,264, making it Arizona's third-most populous county. The county seat is Florence. The county was founded in 1875.