David Gregg McIntosh (March 16, 1836 – October 16, 1916) was a Confederate artillery officer during the American Civil War from the state of South Carolina. David McIntosh was practicing law when the Civil War broke out in 1861. The only military experience he had was as a member of the local militia before the war, but after his native South Carolina seceded on December 20, 1860, McIntosh offered his services to the state. On July 29, 1861 he was appointed captain of Company D, 1st South Carolina Infantry, seeing action at the Battle of Vienna. His company was converted to the Pee Dee Light Artillery in 1862 and he saw action on the Peninsula Campaign, the Battle of Harpers Ferry, the Battle of Antietam, and the Battle of Fredericksburg.