The 9th Regiment Michigan Volunteer Cavalry was an cavalry regiment that served in the Union Army during the American Civil War. The Ninth Cavalry began its organization in the fall of 1862, at Coldwater, under the direction of Colonel James L. David, of Trenton, who had been Quartermaster of the 1st. Michigan Cavalry. The Regiment, with the exception of 2 companies incomplete, was mustered into the service of the United States on the 19th. of May, 1863, the muster rolls containing the names of 1073 officers and men.