The Township was named in honor of Judge Daniel Westbrook Dingman, and was created on April 17, 1832[3] from part of the former Upper Smithfield township.

[4][5] The Callahan House, Minisink Archeological Site, and Gifford Pinchot House are listed on the National Register of Historic Places.

As of the census[8] of 2010, there were 11,926 people, 4,185 households, and 3,304 families residing in the township.

The racial makeup of the township was 91.7% White, 3.4% African American, 0.3% Native American, 0.8% Asian, 0.1% Native Hawaiian or Pacific Islander, 1.6% from other races, and 2% from two or more races.

16.7% of all households were made up of individuals, and 5.8% had someone living alone who was 65 years of age or older.