Chinook is located in Blaine county Montana with a geographic area of 0.5 square miles. The total population in Chinook is 1,225 with 52.2% male and 47.8% female. Children under age 5 represent 5.4% of the population, under age 18 equal 22.3% of the population and over age 65 is 21.6% of the population. The median household income is $41,339, per capita income is $33,480. There are a total of 681 housing units with 67.8% owner occupied. Education includes 27.2% of residents that are high school graduates and 32.0% with a bachelor's degree or higher. The average temperature in Chinook in the summer is 67 degrees, and in the winter 27 degrees.