Seaside is located in Clatsop county Oregon with a geographic area of 3.9 square miles. The total population in Seaside is 6,811 with 45.5% male and 54.5% female. Children under age 5 represent 4.2% of the population, under age 18 equal 15.5% of the population and over age 65 is 25.9% of the population. The median household income is $41,625, per capita income is $27,623. There are a total of 3,217 housing units with 39.3% owner occupied. Education includes 29.8% of residents that are high school graduates and 23.7% with a bachelor's degree or higher. The average temperature in Seaside in the summer is 60 degrees, and in the winter 35 degrees.