Washington Township is one of thirteen townships in Tippecanoe County, Indiana, United States. As of the 2010 census, its population was 2,432 and it contained 1,002 housing units.

According to the 2010 census, the township has a total area of 27.03 square miles (70.0 km), of which 26.66 square miles (69.0 km) (or 98.63%) is land and 0.38 square miles (0.98 km) (or 1.41%) is water.

• Americus at 40°31′33″N 86°45′29″W / 40.5258695°N 86.7580635°W / 40.5258695; -86.7580635
• Buck Creek at 40°29′16″N 86°45′41″W / 40.4878136°N 86.7613963°W / 40.4878136; -86.7613963
• Colburn at 40°31′07″N 86°42′47″W / 40.5186472°N 86.7130616°W / 40.5186472; -86.7130616
• Delp at 40°29′22″N 86°48′33″W / 40.4894798°N 86.8091753°W / 40.4894798; -86.8091753

(This list is based on USGS data and may include former settlements.)

• Tippecanoe Township, Carroll County (north)
• Deer Creek Township, Carroll County (northeast)
• Madison Township, Carroll County (east)
• Clay Township, Carroll County (southeast)
• Perry Township (south)
• Fairfield Township (southwest)
• Tippecanoe Township (west)

The township contains these four cemeteries: Americus, Cunningham, Hollywood and North Union.

• Indiana State Road 25

• Tippecanoe School Corporation

• Indiana's 4th congressional district
• State House District 41
• State Senate District 07

• United States Census Bureau 2007 TIGER/Line Shapefiles
• United States Board on Geographic Names (GNIS)
• United States National Atlas

• Indiana Township Association
• United Township Association of Indiana