Battery H, 2nd Illinois Light Artillery Regiment was an artillery battery from Illinois that served in the Union Army during the American Civil War.

The battery was organized in December 1861 at Springfield, Illinois before traveling to Cairo and to western Kentucky in early 1862.

The battery formed the garrison of Fort Donelson and Clarksville, Tennessee from March 1863 until the end of the war.

3rd Division, Reserve Corps, Army of the Cumberland, to October, 1863.

Moved to Clarksville, Tenn., August 26, and duty there as garrison and on mounted scouting between Cumberland and Tennessee Rivers and on Edgefield & Kentucky R. R. until July, 1865.

Reenlisted January 1, 1864, and Veterans on furlough March 5 to April 9, 1864.