San Tan Valley has always been a place defined by possibility. Long before it became Arizona’s newest municipality, the community was a patchwork of farmland, homesteads and ranchettes stretching across western Pinal County.
Master-planned neighborhoods, cul-de-sacs and families arrived in waves during the housing boom of the late 1990s and early 2000s. Yet despite its rapid growth, San Tan Valley remained something of an outlier — large, vibrant and unincorporated.
That changed on Aug. 5, 2025, when residents voted to incorporate after several previous attempts. The Pinal County Board of Supervisors officially approved incorporation on Sept. 17, 2025, making San Tan Valley Arizona’s 92nd incorporated municipality…