Albert R. Alexander (November 8, 1859 - 1966) was a Canadian-born American judge who from Plattsburg, Missouri, who became the world's oldest serving judge and the world's longest serving judge. He retired on July 9, 1965, at the age of 105 years and 8 months. Judge Wesley E. Brown holds the record as the oldest practicing federal judge while Judge Joseph William Woodrough, who was on the Eighth Circuit until 1977, also lived to the age of 104.