Riverside is located in Suffolk county New york with a geographic area of 0.3 square miles. The total population in Riverside is 627 with 40.4% male and 59.6% female. Children under age 5 represent 3.7% of the population, under age 18 equal 30.0% of the population and over age 65 is 25.5% of the population. The median household income is $63,224, per capita income is $28,076. There are a total of 271 housing units with 87.8% owner occupied. Education includes 33.2% of residents that are high school graduates and 11.1% with a bachelor's degree or higher. The average temperature in Riverside in the summer is 70 degrees, and in the winter 27 degrees.