4th Massachusetts Heavy Artillery Regiment

4th Massachusetts Heavy Artillery Regiment, U.S. Volunteers
ActiveAugust 1864 to 17 June 1865
CountryUnited States of America
AllegianceUnion
BranchUnited States Army
TypeHeavy artillery
Size1829
Private Joseph N. Walls of Co. G, 4th Massachusetts Heavy Artillery Regiment. From the Liljenquist Family Collection of Civil War Photographs, Prints and Photographs Division, Library of Congress

The 4th Massachusetts Volunteer Heavy Artillery Regiment was a unit that served in the Union Army during the latter part of the American Civil War. It was formed from former Unattached Companies of Heavy Artillery raised by Massachusetts to serve the state and for the defenses of Washington, D.C.