Dennis port is located in Barnstable county Massachusetts with a geographic area of 3.0 square miles. The total population in Dennis port is 3,523 with 53.6% male and 46.4% female. Children under age 5 represent 6.5% of the population, under age 18 equal 16.5% of the population and over age 65 is 22.2% of the population. The median household income is $48,085, per capita income is $35,167. There are a total of 1,683 housing units with 58.8% owner occupied. Education includes 16.8% of residents that are high school graduates and 32.4% with a bachelor's degree or higher. The average temperature in Dennis port in the summer is 70 degrees, and in the winter 30 degrees.