Big Grove Township is one of twenty townships in Benton County, Iowa, United States.

[1] Big Grove Township was organized in 1856.

[2] According to the United States Census Bureau, Big Grove Township covers an area of 35.93 square miles (93.07 square kilometers).

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

The township contains these four cemeteries: Bishop Grove, Indian, LaRue and Van Metre.