Battery L, 1st New York Light Artillery ("Rochester Union Grays") was an artillery battery that served in the Union Army during the American Civil War.
The battery was organized at Rochester, New York and mustered in for a three-year enlistment on November 17, 1861 under the command of Captain John A. Reynolds.
The battery was attached to Defenses of Washington, D.C., to February 1862.
1st Brigade, Sigel's Division, Department of the Shenandoah, to June 1862.
1st Division, III Corps, Army of Virginia, to September 1862.
Artillery Reserve, Army of the Potomac, attached to IX Corps, to April 1865.
Battery L, 1st New York Light Artillery mustered out of service on June 17, 1865.
Duty at Camp Barry, defenses of Washington, until February 1862, and at Baltimore, Md., until May 1862.
Duty at Falmouth and Belle Plains until April.
Operations at Pollock's Mill Creek April 29-May 2.
Dabney's Mills, Hatcher's Run, February 5–7, 1865.
Moved to Washington, D.C. Grand Review of the Armies May 23.