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.

San Tan Valley derives its make known from the comprehensible San Tan Mountains. The heritage of the read out San Tan is disputed, with suggestions ranging from a ruination of the say Santa Ana to the last post of George Santan, prior postmaster in friendly Gila County. Previously referred to as San Tan Heights, San Tan Foothills, Greater San Tan and comprehensibly the San Tan Area, the community lacked any official name and residents used comprehensible Queen Creek for their mailing addresses. To coincide in imitation of the accessory of a other ZIP code for the community upon July 1, 2009, the United States Postal Service was petitioned to present the area with a new name. As allocation of the initial request, “Bella Vista” name was submitted to the postal service, drawing the ire of some local residents who opposed the suggested name. In response, the Greater San Tan Area Coalition organized a non-binding vote on June 23, offering residents the opportunity to vote upon a read out for the community.

The area, which had consisted primarily of undeveloped desert and agriculture prior to 2000, experienced considerable addition in the to come part of the decade. As in advance as 2004, attempts to incorporate the Place were underway. An initial attempt, which proposed a post of simply “San Tan” for the area, was blocked by the adjacent to town of Florence after rural residents there expressed matter that allowing combination would accelerate the urbanization of the area. A subsequent effort in 2005 bungled to gain traction. Following the renaming of the Place in 2009, a renewed effort at engagement sought to put the thing to a vote in 2010, this time behind the hold of Pinal County. The Town Council of Florence unanimously rejected a answer that would have certified San Tan Valley’s proposed boundaries higher than concerns of their allotment of come clean shared revenue.

San Tan Valley is located at 33°10′13″N 111°34′20″W / 33.17028°N 111.57222°W / 33.17028; -111.57222 (33.170462, -111.572170).