Providence County is the most populous county in the U.S. state of Rhode Island. As of the 2020 census, the county's population was 660,741, or 60.2% of the state's population. Providence County contains the city of Providence, the state capital of Rhode Island and the county's (and state's) most populous city, with an estimated 179,335 residents in 2018. Providence 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. In 2010, the center of population of Rhode Island was located in Providence County, in the city of Cranston.