Brownsville Township is one of six townships in Union County, Indiana, United States.

As of the 2020 census, its population was 744 and it contained 332 housing units.

[2] According to the 2010 census, the township has a total area of 28.54 square miles (73.9 km2), of which 28.39 square miles (73.5 km2) (or 99.47%) is land and 0.15 square miles (0.39 km2) (or 0.53%) is water.

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

The township contains these two cemeteries: Richland and Woods Chapel.