Isaac Marston (January 2, 1839 – October 31, 1891) was an American jurist and politician.
Born in Poyntzpass, County Armagh, Ireland, Marston emigrated to the United States and worked on a farm in Pontiac, Michigan with an uncle. In 1861, he graduated from University of Michigan Law School and practiced law in Ithaca, Michigan. In 1872, Marston served in the Michigan House of Representatives. Then, in 1874, Marston served as Michigan Attorney General. From 1875 to 1883, Marston served on the Michigan Supreme Court and was chief justice. He then practiced law in Detroit, Michigan. Marston died at his Riverside Farm near Bay City, Michigan.[1][2][3][4]