Monroe Township is one of thirteen townships in Grant County, Indiana, United States. As of the 2010 census, its population was 1,677 and it contained 669 housing units.
The Israel Jenkins House was listed on the National Register of Historic Places in 2003.
According to the 2010 census, the township has a total area of , of which (or 99.89%) is land and (or 0.14%) is water. Lakes in this township include Lake Marion. The streams of Ball Run, Club Run, Little Walnut Creek, Monroe Prairie Creek and Sports Run run through this township.
(This list is based on USGS data and may include former settlements.)
The township contains one cemetery, Atkinson.
Monroe Township residents may obtain a free library card from the Barton Rees Pogue Memorial Public Library in Upland.