The Ethan Allen House and Gun Shop is an historic property at 37 Waterville Street in Grafton, Massachusetts. The property includes the home and business of armsmaker Ethan Allen. The gun shop was constructed in 1833, while the house was built in 1834-36. Allen, the inventor of the pepper-box revolver, began manufacturing guns in Grafton in 1832; his business was one of the earliest gunmakers in the region and an early part of Grafton's industrial development. Allen's home was a Greek Revival residence, an uncommon style in the area. The property was added to the National Register of Historic Places in 1995.