William Donald Patrick, Lord Patrick (24 December 1889 – 17 February 1967) was a Scottish advocate who served with the Royal Flying Corps during World War I. After the war, he returned to practice law with great success, and became a judge in 1939, as a Senator of the College of Justice. After World War II, he was one of the 12 judges of the Tokyo War Crimes Trial at the end of the Second World War.