Riverhead is located in Suffolk county New york with a geographic area of 15.1 square miles. The total population in Riverhead is 13,879 with 47.8% male and 52.2% female. Children under age 5 represent 4.6% of the population, under age 18 equal 19.0% of the population and over age 65 is 27.5% of the population. The median household income is $64,865, per capita income is $32,633. There are a total of 5,160 housing units with 61.9% owner occupied. Education includes 40.3% of residents that are high school graduates and 16.5% with a bachelor's degree or higher. The average temperature in Riverhead in the summer is 70 degrees, and in the winter 27 degrees.