Sparta Township is one of thirteen townships in Noble County, Indiana. As of the 2020 census, its population was 2,776 (down from 2,924 at 2010[4]) and it contained 1,128 housing units.
According to the 2010 census, the township has a total area of 35.24 square miles (91.3 km2), of which 34.95 square miles (90.5 km2) (or 99.18%) is land and 0.3 square miles (0.78 km2) (or 0.85%) is water.[4]