The Quadrangle–Mattoon Street Historic District is a historic district in Springfield, Massachusetts, bounded by Chestnut Street to the West; State Street to the South; and includes properties on Mattoon, Salem, Edwards and Elliot Streets. Located in the Metro Center, the Quadrangle–Mattoon Street Historic District is one of the few neighborhoods in the Knowledge Corridor lined with historic, restored red-brick Victorian row houses on both sides, covered by tree canopies.