Zephaniah Platt (March 31, 1796 – April 20, 1871) was an American lawyer and politician from Michigan.
Platt was born on March 31, 1796, in Pleasant Valley, Dutchess County, New York.
Platt, an antislavery Whig,[3] was Attorney General of the State of Michigan from 1841 to 1843.
Subsequently, Platt acted as representative for some of the American Fur Company's Ojibwe traders seeking recompense for past Indian debts.
After the end of the American Civil War, he removed to South Carolina, and was Judge of the 2nd Circuit Court from 1868 until his death.