Niagara is a town in Marinette County, Wisconsin, United States. The population was 924 at the 2000 census. The city of Niagara is located to the north of and adjacent to the town. According to the United States Census Bureau, the town has a total area of 68.4 square miles, of which, 67.1 square miles of it is land and 1.2 square miles of it is water.