The origin of the name San Tan is disputed, with suggestions ranging from a corruption of the name Santa Ana to the last name of George Santan, prior postmaster in nearby Gila County.

As part 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.

[9] The Town Council of Florence unanimously rejected a resolution that would have approved San Tan Valley's proposed boundaries over concerns of their allotment of state shared revenue.

San Tan Valley is located in the unincorporated area between the towns of Queen Creek to the north and west, and Florence to the south.

The area consists largely of planned communities, such as Pecan Creek South, San Tan Heights, Archer Meadows, and Johnson Ranch.