Duncan Township, Tioga County, Pennsylvania

[2] According to the United States Census Bureau, the township has a total area of 19.8 square miles (51 km2), all land.

As of the census[4] of 2000, there were 213 people, 91 households, and 56 families residing in the township.

There were 142 housing units at an average density of 7.2 per square mile (2.8/km2).

31.9% of all households were made up of individuals, and 18.7% had someone living alone who was 65 years of age or older.

None of the families and 6.8% of the population were living below the poverty line, including no under eighteens and 2.6% of those over 64.