Denning is located in Ulster county New york with a geographic area of square miles. The total population in Denning is 480 with 49.0% male and 51.0% female. Children under age 5 represent 2.1% of the population, under age 18 equal 16.5% of the population and over age 65 is 19.8% of the population. The median household income is $78,906, per capita income is $42,725. There are a total of 185 housing units with 84.9% owner occupied. Education includes 22.7% of residents that are high school graduates and 44.3% with a bachelor's degree or higher. The average temperature in Denning in the summer is 70 degrees, and in the winter 27 degrees.