Wintersburg is an unincorporated community and census-designated place in Maricopa County, Arizona, United States, located 48 miles west of downtown Phoenix and 17 miles west of Buckeye along Salome Highway. It is 4 miles south of Exit 98 on Interstate 10. As of the 2020 census, Wintersburg had a population of 51, down from 136 in 2010. Wintersburg is home to the Palo Verde Nuclear Generating Station, the largest nuclear power plant in the United States.