Woonsocket is a city in Providence County, Rhode Island, United States. The population was 41,186 at the 2010 census, making it the sixth largest city in the state. Woonsocket lies directly south of the Massachusetts state line and constitutes part of both the Providence metropolitan area and the larger Greater Boston Combined Statistical Area.The city is the corporate headquarters of CVS Health, a pharmacy services provider. It is home to Landmark Medical Center, the Museum of Work and Culture, and the American-French Genealogical Society.