Interstate 93 (I-93) is an Interstate Highway in the New England region of the United States. It begins in Canton, Massachusetts, in the Boston metropolitan area, at I-95; and ends near St. Johnsbury, Vermont, at I-91. It is one of three mainline Interstate highways located entirely in New England, the other two being I-89 and I-91. The largest cities along its route are Manchester, New Hampshire and Boston, Massachusetts.