Coltsville Historic District is a National Historic Landmark District in Hartford, Connecticut. The district encompasses the factory, worker housing, and owner residences associated with Samuel Colt (1814-1862), one of the nation's early innovators in precision manufacturing and the production of firearms. It was the site of important contributions to manufacturing technology made by Colt and the industrial enterprise he created. Coltsville is a cohesive and readily identifiable 260-acre (110 ha) area, part of which was originally listed as the Colt Industrial District on the National Register of Historic Places in 1976. It was designated a National Historic Landmark in 2008.

The Colt Armory is a historic factory complex for the manufacture of firearms, created by Samuel Colt. It is located in Hartford, Connecticut along the Connecticut River, and as of 2008 is part of the Coltsville Historic District, named a National Historic Landmark District. It is slated to become part of Coltsville National Historical Park, now undergoing planning by the National Park Service.