Antioch Township is a civil township of Wexford County in the U.S. state of Michigan. As of the 2010 census, the township population was 810. T…Antioch Township is a civil township of Wexford County in the U.S. state of Michigan. As of the 2010 census, the township population was 810. The township is home to Briar Hill, the highest elevation in the Lower Peninsula at 1,706 feet above sea level.