Antoine Ephrem Cartier (May 16, 1836 – March 1, 1910) was a 19th-century American businessman who assisted in the development of Ludington, Michigan. He was a business owner, stock speculator, lumber tycoon, sawmill owner, and real estate investor. He was mayor of Ludington from 1880 through 1888 and progenitor of a line of mayors sharing his Cartier name.