Sonoita (O'odham: Ṣon ʼOidag) is a census-designated place (CDP) in Santa Cruz County, Arizona, United States. The population was 818 at the 2010 census.
The origin of the name of the CDP is the O'odham Ṣon ʼOidag, which may be best translated as "spring field". (There are several places that the O'odham call Ṣon ʼOidag within 200 km of this place, all agricultural spots.) Sonoita has for many years been a popular place for wealthy Arizonans to establish vacation and retirement homes and ranches. Sonoita is presently experiencing significant growth.