David Addison Weisiger (December 23, 1818 – February 23, 1899) was a Confederate States Army brigadier general during the American Civil War (Civil War). Weisiger served as a second lieutenant in the 1st Virginia Volunteers, an infantry regiment, during the Mexican-American War. After the war, he was a businessman at Petersburg, Virginia. Between 1853 and 1860, he served in the 39th Virginia Militia Regiment, rising from captain to colonel. After the Civil War, he was a bank cashier at Petersburg, Virginia and a businessman at Richmond, Virginia.