In 1859, a rectangular by two-story rear addition was added to common southeast wall of the jail. Made of cut granite blocks and topped with a flat roof, the addition added five cells on each of its two levels. The jail was discontinued by the State of Rhode Island in June 1957 and the Bristol Historical Society (later the Bristol Historical and Preservation Society) leased the property following a fire at the Rogers Free Library. The Bristol Historical Society removed partitions in the first floor and added new access points as part of its renovations, including the removal of the internal east chimney. However, the building retains much of its unaltered interior features, and the jail cells are used by the Society as a public exhibit. The Bristol County Jail was added to the National Register of Historic Places in 1973 and currently serves as the Historical Society headquarters.
