Coulee dam is located in Okanogan county Washington with a geographic area of 0.7 square miles. The total population in Coulee dam is 1,355 with 50.6% male and 49.4% female. Children under age 5 represent 5.0% of the population, under age 18 equal 21.8% of the population and over age 65 is 20.8% of the population. The median household income is $60,625, per capita income is $35,710. There are a total of 612 housing units with 69.3% owner occupied. Education includes 23.9% of residents that are high school graduates and 31.2% with a bachelor's degree or higher. The average temperature in Coulee dam in the summer is 60 degrees, and in the winter 42 degrees.