Washington Township is one of fourteen townships in Morgan County, Indiana, United States. As of the 2010 census, its population was 17,073 and it contained 7,171 housing units. The township contains a portion of the Morgan–Monroe State Forest.

Morgan County is a county located in the U.S. state of Indiana. As of the 2020 United States Census, the population was 71,780. The county seat is Martinsville.