Winterhaven is a census-designated place (CDP) in Imperial County, California. Winterhaven is 6.5 miles (10 km) east of Pilot Knob, The population was 390 at the 2020 census. It is part of the El Centro, CA Metropolitan Area. North of Interstate 8 and bordering Yuma, Arizona, the town is partly in the Fort Yuma Indian Reservation. The Colorado River marks the town's southern border.