Star Valley is a town located in the U.S. state of Arizona. It is within Gila County surrounded to the west by the town of Payson. It has a total land area of 36.1 square miles at 33°21′4″N 110°27′36″W. Star Valley was incorporated in 2005. As of the 2010 census data, it had a total population of 2,310. The population density was 63.27/sq mi. Estimated per capita income in 2015 was $21,278.