Battery C, 1st Illinois Light Artillery Regiment, was an artillery battery that served in the Union Army during the American Civil War.
The battery was organized Ottawa, Illinois on October 31, 1861, and mustered in for a three-year enlistment.
The battery was attached to Military District of Cairo to October 1861.
4th Brigade, 1st Division, District of Cairo, February 1862.
Artillery Division, Army of the Mississippi, to April 1862.
Artillery 1st Division, Army of the Mississippi, to September 1862.
Artillery, 13th Division, Army of the Ohio, to November 1862.
3rd Brigade, 3rd Division, Right Wing, XIV Corps, Army of the Cumberland, to January 1863.
Artillery, 3rd Division, XX Corps, Army of the Cumberland, to October 1863.
Artillery, 1st Division, XIV Corps, to July 1864.
Artillery Brigade, XIV Corps, to June 1865.
Battery C mustered out of service in Louisville, Kentucky on June 14, 1865.
Moved to Iuka, Mississippi, July 21, thence to Courtland, Alabama, and duty along Memphis and Charleston Railroad until September 3.
Passage of Cumberland Mountains and Tennessee River and Chickamauga Campaign August 16-September 22.
Operations on line of Pumpkin Vine Creek and battles about Dallas, New Hope Church, and Allatoona Hills May 25-June 5.