High Quality Content by WIKIPEDIA articles! Liberty Township is one of the eighteen townships of Delaware County, Ohio, United States. The 2000 census found 15,429 people in the township, 9,182 of whom lived in the unincorporated portions of the township. This was a significant increase from the 1990 census, at which time its population was only 3,790. Liberty Township had 5,681 housing units in 2000.