Brown Township is one of eleven townships in Montgomery County, Indiana, United States.

As of the 2020 census, its population was 1,617 (down from 1,719 at 2010[3]) and it contained 705 housing units.

[2] According to the 2010 census, the township has a total area of 54.22 square miles (140.4 km2), of which 53.75 square miles (139.2 km2) (or 99.13%) is land and 0.47 square miles (1.2 km2) (or 0.87%) is water.

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

The township contains these eight cemeteries: Indian Creek, Indian Creek Hill, Jones, Lydick, Maple Ridge, Old Hickory, Old Union and Wasson.