Battery B, 1st New York Light Artillery was an artillery battery that served in the Union Army during the American Civil War.

The battery was organized at Baldwinsville, New York and mustered in for a three-year enlistment on September 24, 1861 under the command of Captain Rufus D. Pettit.

The battery was attached to Artillery Reserve, Army of the Potomac, November 1861 to March 1862.

Artillery, 1st Division, II Corps, Army of the Potomac, to May 1862.

1st Volunteer Brigade, Artillery Reserve, Army of the Potomac, to July 1863.

Artillery Reserve, Army of the Potomac, to January 1864.

1st Brigade, Artillery Reserve, Army of the Potomac, to March 1864.

Artillery Brigade, V Corps, Army of the Potomac, to June 1865.

Battery B, 1st New York Light Artillery mustered out of service on June 18, 1865.

Left New York for Washington, D.C., October 31, 1861, and duty in the defenses of that city until March 1862.

Advance up Loudoun Valley and movement to Falmouth, Va., October 20-November 17.

Poplar Grove Church, Peebles' Farm, September 29-October 2.

Boydton Plank Road, Hatcher's Run, October 27–28.