Battery L, 1st Missouri Light Artillery Regiment was an artillery battery unit from Missouri that served in the Union Army during the American Civil War.

The original Battery L was formed 1 September 1861 but was disbanded in January 1862.

Battery L fought at the battles of Prairie Grove and Van Buren in December 1862.

Thereafter, the battery performed guard duty at different locations in Missouri, with a foray into Arkansas.

Ordered to Jefferson City, Mo., August 17; thence moved to Rolla, Mo., and duty there until October.

Original Battery on duty at St. Louis, Mo., until January, 1862, when disbanded.

Attached to 1st Brigade, 3rd Division, Army of the Frontier, Dept.

Scout from Houston to Spring River Mills and skirmish August 6–11.