Lima Township is one of eleven townships in LaGrange County, Indiana, United States. As of the 2020 census, its population was 2,383 (down from 2,507 at 2010) and it contained 1,014 housing units. It contains the census-designated place of Howe.
Lima Township was established in 1832.
John Badlam Howe Mansion, St. James Memorial Chapel, Star Milling and Electric Company Historic District, and Samuel P. Williams House are listed on the National Register of Historic Places.
According to the 2010 census, the township has a total area of , of which (or 97.41%) is land and (or 2.59%) is water.