The 2nd Regiment Massachusetts Volunteer Heavy Artillery was a regimental unit that fought in the American Civil War from 1863 to 1865. Initially formed 28 July 1863 in Readville, Massachusetts with Company A, it was supported with 11 other companies ending with Company M on 24 December 1863 (Company J did not exist). The 2nd served in the states of Virginia and North Carolina during operations in Plymouth, North Carolina, Kinston, and Virginia.