Cleveland Township is one of nine townships in Whitley County, Indiana, United States. As of the 2020 census, its population was 3,324 and it contained 1,398 housing units. According to the 2010 census, the township has a total area of 49.04 square miles, all land. The Eel River flows westward through the township. The streams of Clear Creek, S…Cleveland Township is one of nine townships in Whitley County, Indiana, United States. As of the 2020 census, its population was 3,324 and it contained 1,398 housing units. According to the 2010 census, the township has a total area of 49.04 square miles, all land. The Eel River flows westward through the township. The streams of Clear Creek, Spring Creek, Sugar Creek and Sycamore Creek run through this township. Lakes in this township include T Lake.