4th New York Heavy Artillery Regiment

Volunteers was a heavy artillery regiment that served in the Union Army during the American Civil War.

The regiment operated as both heavy artillery and infantry beginning in February 1862 while serving in the defenses of Washington, D.C., and continued in both capacities until the end of the war.

The regiment was organized at New York City, New York, beginning November 1861 through February 1862 and mustered in at Port Richmond, Staten Island, for three years service under the command of Colonel Thomas Donnelly Doubleday.

Whipple's Command, Military District of Washington, to October 1862.

Abercrombie's Division, XXII Corps, Department of Washington, to April.

Artillery Brigade, VI Corps, Army of the Potomac, to May 1864 (consisting of Batteries C, D, L, and M, organized as 1st Battalion).

Artillery Brigade, V Corps, to May 1864 (consisting of Batteries E, F, H, and K organized as 2nd Battalion).

Artillery Brigade, II Corps, to May 1864 (consisting of Batteries A, B, G, and I organized as 3rd Battalion).

2nd Brigade, 3rd Division, II Corps (2nd Battalion), June 25 to July 13, 1864.

Battery I with Artillery Brigade, II Corps, July to December 1864.

Battery L with Artillery Brigade, II Corps, July 1864, to March 1865.

The 4th New York Heavy Artillery mustered out of the service at Washington, D.C., on September 29, 1865.