Battery "K" 1st Regiment of Artillery was a light artillery battery that served in the Union Army during the American Civil War.
The battery was stationed at Eagle Pass, Fort Duncan, Texas January–February 1861 before moving to Fort Taylor, Florida where it served until January 1862.
It then moved to Washington, D.C., where it was attached to Artillery Reserve, Army of the Potomac, to May 1862.
2nd Brigade, Artillery Reserve, V Corps, Army of the Potomac, to September 1862.
Artillery Reserve, Army of the Potomac, to June, 1862.
2nd Brigade, Horse Artillery, Army of the Potomac, to June 1864.
Horse Artillery, Army of the Shenandoah, Middle Military Division, to December 1864.
Horse Artillery Reserve, Army of the Shenandoah, to April 1865.
Moved to Fort Monroe, then to Centerville August 16–28.
Brandy Station or Fleetwood and Beverly Ford June 9.
Wilson's Raid on Southside & Danville Railroad June 22–30.
Smithfield Crossing, Opequan Creek, August 29.
Savior's Ford, Opequan Creek, September 15.
Duty in the defenses of Washington and the Shenandoah Valley until August 1865.