Rock Ridge is a census-designated place (CDP) in the town of Greenwich, Connecticut, United States. It is in the western part of the town, just east of the New York state border. As of the 2020 census, Rock Ridge had a population of 658. Rock Ridge was first listed as a CDP prior to the 2020 census.
As with other parts of the Town of Greenwich, Rock Ridge is in the Greenwich Public Schools school district. The district's comprehensive high school is Greenwich High School.