Initial listing extended from Providence, through Pawtucket, and as far north as Lincoln; a 1991 expansion (#91001536) extended it to the state line; the canal itself extended into Worcester County, Massachusetts, where it is the subject of separate listings.
^Numbers represent an alphabetical ordering by significant words. Various colorings, defined here, differentiate National Historic Landmarks and historic districts from other NRHP buildings, structures, sites or objects.
^The eight-digit number below each date is the number assigned to each location in the National Register Information System database, which can be viewed by clicking the number.