Interlaken is located in Monmouth county New jersey with a geographic area of 0.3 square miles. The total population in Interlaken is 747 with 46.2% male and 53.8% female. Children under age 5 represent 4.6% of the population, under age 18 equal 14.1% of the population and over age 65 is 34.8% of the population. The median household income is $123,750, per capita income is $72,474. There are a total of 340 housing units with 97.4% owner occupied. Education includes 13.8% of residents that are high school graduates and 71.8% with a bachelor's degree or higher. The average temperature in Interlaken in the summer is 73 degrees, and in the winter 34 degrees.
