Hobart Township is one of eleven townships in Lake County, Indiana. As of the 2010 census, its population was 39,417 and it contained 16,366 housing units.
According to the 2010 census, the township has a total area of , of which (or 98.04%) is land and (or 1.96%) is water. It includes most of the City of Hobart, the entire City of Lake Station and Town of New Chicago, and a small portion of the City of Gary, as well as a small unincorporated area known as Viking Village. Its public school districts include the School City of Hobart, the River Forest Community School Corporation, and the Lake Station Community School Corporation, each with one high school: Hobart High School, River Forest High School, and Thomas A. Edison High School.