Fairbanks Township is one of nine townships in Sullivan County, Indiana, United States. As of the 2020 census, its population was 721 and it contained 318 housing units.
Fairbanks Township was named for one General Fairbanks.
According to the 2010 census, the township has a total area of , of which (or 98.77%) is land and (or 1.25%) is water.
(This list is based on USGS data and may include former settlements.)
The township contains these four cemeteries: Chowning, DeBaun, Pogue and Riggs-Ernest.