Cold spring harbor is located in Suffolk county New york with a geographic area of 3.4 square miles. The total population in Cold spring harbor is 2,864 with 43.9% male and 56.1% female. Children under age 5 represent 8.2% of the population, under age 18 equal 29.6% of the population and over age 65 is 11.1% of the population. The median household income is $250,000, per capita income is $88,536. There are a total of 894 housing units with 93.3% owner occupied. Education includes 8.9% of residents that are high school graduates and 82.4% with a bachelor's degree or higher. The average temperature in Cold spring harbor in the summer is 70 degrees, and in the winter 27 degrees.