Springfield Township is one of twenty-one townships in LaPorte County, Indiana. As of the 2020 census, its population was 3,770 (down from 4,045 at 2010[4]) and it contained 1,574 housing units.
According to the 2010 census, the township has a total area of 33.41 square miles (86.5 km2), of which 33.29 square miles (86.2 km2) (or 99.64%) is land and 0.12 square miles (0.31 km2) (or 0.36%) is water.[4]
Communities in the township include the incorporated town of Michiana Shores and the unincorporated community of Springville.