Elk Rapids Township is a civil township of Antrim County in the U.S. state of Michigan. The population was 2,521 at the 2020 census. The village of Elk Rapids is located within the township. According to the United States Census Bureau, the township has a total area of 11.0 square miles, of which 7.1 square miles is land and 3.9 square miles, or 35.41%, is w…Elk Rapids Township is a civil township of Antrim County in the U.S. state of Michigan. The population was 2,521 at the 2020 census. The village of Elk Rapids is located within the township. According to the United States Census Bureau, the township has a total area of 11.0 square miles, of which 7.1 square miles is land and 3.9 square miles, or 35.41%, is water.