 The unincorporated community of Clark is located in the town.According to the United States Census Bureau, the town has a total area of 33.7 square miles (87.4 km²), of which, 33.3 square miles (86.4 km²) of it is land and 0.4 square miles (1.0 km²) of it (1.13%) is water.The six mile square that would become Hixon was first surveyed in the summer of 1847 by a crew working for the U.S. government.