Warren is a town in Bristol County, Rhode Island, United States. The population was 11,147 at the 2020 census.

Bristol County is a county located in the U.S. state of Rhode Island. As of the 2020 census, the population was 50,793, making it the least populous county in Rhode Island. In terms of land area, it is the third-smallest county in the United States, at only 25 square miles (65 km2). The county was created in 1747 when it was separated from Bristol County, Massachusetts. Bristol County is included in the Providence-Warwick, RI-MA Metropolitan Statistical Area, which in turn constitutes a portion of the greater Boston-Worcester-Providence, MA-RI-NH-CT Combined Statistical Area.