Geography 200px|thumb|left|Looking east at the unincorporated community of Union, located within the Town of Union According to the United States Census Bureau, the town has a total area of 34.1 square miles (88.3 km2), of which, 34.1 square miles (88.2 km2) of it is land and 0.04 square miles (0.1 km2) of it (0.09%) is water.
Geography 200px|thumb|left|Looking east at the unincorporated community of Union located within the Town of Union According to the United States Census Bureau the town has a total area of 341 square miles (883 km2) of which 341 square miles (882 km2) of it is land and 004 square miles (01 km2) of it (009%) is water