Orion is a town in Richland County, Wisconsin, United States. The population was 628 at the 2000 census. The unincorporated communities of Orion and Twin Bluffs are located in the town. According to the United States Census Bureau, the town has a total area of 36.2 square miles, of which, 35.8 square miles of it is land and 0.4 square miles of it is water.