The Town of Richfield is located in Wood County, Wisconsin, United States. The population was 1,523 at the 2000 census. The unincorporated community of Bethel is located within the town. According to the United States Census Bureau, the town has a total area of 34.8 square miles, of which, 34.8 square miles of it is land and 0.04 square miles of it is wa…The Town of Richfield is located in Wood County, Wisconsin, United States. The population was 1,523 at the 2000 census. The unincorporated community of Bethel is located within the town. According to the United States Census Bureau, the town has a total area of 34.8 square miles, of which, 34.8 square miles of it is land and 0.04 square miles of it is water.