The Sonoran green toad is endemic to the counties of Pima and Pinal in Arizona in the south western United States and to northern Mexico. In the United States its range extends from near Mobile southwards to the San Cristobal Wash and the Organ Pipe Cactus National Monument and eastwards to the Mission San Xavier del Bac and the Altar Valley. In Mexico its range is from the west-central part of Sonora State northwards. Its altitudinal range is from . Its typical habitat is arid and semi-arid plains with grass, creosote bush, mesquite and saguaro.