Ilwaco is located in Pacific county Washington with a geographic area of 2.1 square miles. The total population in Ilwaco is 1,431 with 49.5% male and 50.5% female. Children under age 5 represent 2.2% of the population, under age 18 equal 17.6% of the population and over age 65 is 30.8% of the population. The median household income is $50,402, per capita income is $28,371. There are a total of 479 housing units with 69.5% owner occupied. Education includes 25.5% of residents that are high school graduates and 19.2% with a bachelor's degree or higher. The average temperature in Ilwaco in the summer is 58 degrees, and in the winter 42 degrees.