About San Tan Valley, Arizona
San Tan Valley is an unincorporated community and census-designated place in northern Pinal County, Arizona, United States. As of the census of 2020, the population of San Tan Valley is 99,894.Source
Pinal County is in the central part of the U.S. state of Arizona. According to the 2020 U.S. 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.