There are 3 US Post Offices in Bristol County serving a total of 49,875 residents equating to 16,625 residents per post office. It's estimated that approximately 79,606 packages are handled across the 3 county post offices annually. Bristol County is a county located in the U.S. state of Rhode Island. As of the 2010 census, the population was 49,875, 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 is also included in the Boston-Worcester-Providence, MA-RI-NH-CT Combined Statistical Area."