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.

McIntosh was promoted to lieutenant-colonel in February 1864 and commanded his battalion in the Overland Campaign, including the Battle of the Wilderness.

McIntosh left to join CSA forces in the Trans-Mississippi Department, commanded by Lt. Gen. Simon Bolivar Buckner and later General Edmund Kirby Smith.

However, President Davis was captured at Irwinville, Ga., on May 10, 1865, and with the final surrender of all CSA armies in the field the war came to a close.

McIntosh moved to Towson, Maryland, and formed a law partnership with Arthur W. Machen and Richard S. Gittings in 1868.