|— Township —|
|- Total||36.37 sq mi (94.19 km2)|
|- Land||36.37 sq mi (94.19 km2)|
|- Water||0 sq mi (0 km2) 0%|
|Elevation||755 ft (230 m)|
|- Density||11.8/sq mi (4.5/km2)|
|GNIS feature ID||0467491|
Brookfield Township covers an area of 36.37 square miles (94.2 km2) and contains no incorporated settlements. According to the USGS, it contains two cemeteries: Elwood and Union.
The stream of Elwood Creek runs through this township.