Battery A, 1st Pennsylvania Light Artillery was a light artillery battery that served in the Union Army as part of the Pennsylvania Reserves infantry division during the American Civil War.
The battery was organized at Harrisburg, Pennsylvania and mustered in for a three-year enlistment on August 5, 1861 under the command of Captain Hezekiah Easton.
The battery was attached to McCall's Pennsylvania Reserve Division, Army of the Potomac, to March 1862.
Artillery, 2nd Division, I Corps, Army of the Potomac, to April 1862.
Artillery, 3rd Division, III Corps, Army of Virginia, to September 1862.
Artillery, 3rd Division, IX Corps, Army of the Potomac, to April 1863.
Artillery, 2nd Division, VII Corps, Department of Virginia, to July 1863.
Artillery, Heckman's Division, XVIII Corps, Department of Virginia and North Carolina, to April 1864.
Artillery Brigade, XXIV Corps, Department of Virginia, to July 1865.
Expedition from White House to South Anna River July 1–7.
Engaged in demolishing defenses and removing ordnance at Richmond until July.