Eel River Township is one of twenty townships in Allen County, Indiana, United States. As of the 2010 census, its population was 3,612.
According to the United States Census Bureau, Eel River Township covers an area of ; of this, is land and , or 0.15 percent, is water.
(This list is based on USGS data and may include former settlements.)
The township contains these four cemeteries: Eel River, Fairview, Riverview and Watterson.