The 15th Massachusetts Battery (or 15th Battery Massachusetts Light Artillery) was an artillery battery that served in the Union Army during the American Civil War. The unit was organized partly at Camp Chase in Lowell, Massachusetts and partly at Fort Warren during the winter of 1862-1863. The majority of its members were mustered into federal service on February 17, 1863. It was assigned to the Department of the Gulf commanded by Major General Nathaniel P. Banks and departed Massachusetts by steamship on March 9. During its term, the unit suffered from a large number of desertions and gained an unfortunate reputation despite the service of its many loyal members.