Battery E, 1st U.S. Artillery was a United States Army field artillery battery that was in service between 1821 and 1901, most notably in extensive service with the Union Army during the American Civil War.
During the Civil War, the battery was present at the Siege of Fort Sumter in April 1861 under the command of Captain Abner Doubleday. Returned to the artillery defenses of Washington, D.C., and rearmed as a field artillery battery, the unit was merged with Battery G, 1st U.S. Artillery in February 1862. Consolidated and renamed Battery E & G, 1st U.S. Artillery, the unit continued with this designation until the end of the war.
The unit is also known for its participation in the Wounded Knee Massacre in 1890.