Smith Township, Mahoning County, on the south; Lexington Township, Stark County, on the southwest (touches, however doesn't border); Atwater Township, on the west; Edinburg Township, on the northwest (touches, however doesn't border); Palmyra Township, on the north; Milton Township, Mahoning County, on the northeast (touches, however doesn't border); Berlin Township, Mahoning County, on the east

Deerfield Township is formed from either a Connecticut Western Reserve. When of 2000, there were 3,211 people in the town. (Note: The U.S. Census Bureau counts township populations in the Connecticut Western Reserve as distinct from any municipalities located within the township. For populations of any municipalities in a town, please understand a corresponding articles for victims municipalities.) Deerfield Township covers an vicinity of Xxv mi².