Winter Haven is a city in Polk County, Florida, United States. Neighboring Lakeland to its east, Winter Haven is located about 51 miles (82 km) east of Tampa and about 47 miles (76 km) southwest of Orlando. The city's population was 49,219 at the 2020 census, making it the second most populated city in Polk County after Lakeland. It is a principal city of the Lakeland-Winter Haven, Florida Metropolitan Statistical Area.

Polk County is located in the central portion of the U.S. state of Florida. The county population was 725,046, as of the 2020 census, and estimated to be 818,330, as of July 1, 2023. Its county seat is Bartow, and its largest city is Lakeland.