Rock Hill is a hamlet (and census-designated place) in Sullivan County, New York, United States.

The hamlet of Rock Hill was not named so until October 1885, after the Katrina Falls Road post office was erected on top of a high, rocky cliff.

Following the COVID-19 pandemic in 2020, there has been a significant increase in demand for homes in the Catskills in general and Rock Hill in particular.

About 3.1% of families and 4.0% of the population were below the poverty line, including none of those under the age of eighteen or sixty-five or over.

In 2014, the synagogue opened for year-round services, previously only serving the community in the summer.