Eel River Township is one of twelve townships in Hendricks County, Indiana, United States. As of the 2010 census, its population was 1,662.
Eel River Township was organized in about 1828.
Eel River Township covers an area of . The streams of East Fork Big Walnut Creek, Hunt Creek, Middle Fork Big Walnut Creek and Ramp Run run through this township.
The township contains sixteen cemeteries: Adams, Campbell, Devenport, Fairview, Fleece, Fullen, Gossett, Hypes, Kidd Farm, North Salem Baptist, Page, Pennington, Richardson, Roundtown, Trotter and Zimmerman.
It is in the North West Hendricks School Corporation.