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Rock Hill is the largest city in York County, South Carolina, United States, and the fifth-largest city in the state. It is also the fourth-largest city of the Charlotte metropolitan area, behind Charlotte, Concord, and Gastonia (all located in North Carolina, unlike Rock Hill). As of the 2010 Census, the population was 66,154. In 2019, the population had increased to 75,048.As of 2017, the total population of the Rock Hill Census County Division was estimated at 117,375 people.

The city is located approximately 25 miles (40 km) south of Charlotte and approximately 70 miles (110 km) north of Columbia.

Rock Hill offers scenic riverfront views along the Catawba River and is home to numerous nature trails, restaurants, and thirty-one parks which are used for both national and local events. Its historic downtown consist of twelve contiguous buildings built as early as 1840 offering dining and retail options. The city is also home to three colleges, including Winthrop University, a public liberal arts university founded in 1886 which enrolls nearly 6,000 students annually.