Angus William McDonald (February 14, 1799 – December 1, 1864) was a 19th-century American military officer and lawyer in the U.S. state of Virginia. He also served as a colonel in command of the Confederate States Army's 7th Virginia Cavalry during the American Civil War. McDonald was appointed to serve in a number of prominent political positions including a superintendent overseeing the construction of the Northwestern Turnpike and a commissioner representing Virginia in its boundary dispute with Maryland. McDonald was the grandson of Virginia military officer and frontiersman, Angus McDonald (1727–1778) and the father of United States Fish Commissioner Marshall McDonald (1835–1895).