Wintersburg is an unincorporated community and census-designated place in Maricopa County, Arizona, United States, located 48 miles (77 km) west of downtown Phoenix and 17 miles (27 km) west of Buckeye along Salome Highway.

It is 4 miles (6 km) south of Exit 98 on Interstate 10.

Wintersburg is home to the Palo Verde Nuclear Generating Station, the largest nuclear power plant in the United States.

The population density was 274.5 people per square mile.

The racial makeup of the CDP was 82% White, 2% Black or African American, 1% Native American, 2% Pacific Islander, and 12% from other races.