Fairfield is located in Camas county Idaho with a geographic area of 0.9 square miles. The total population in Fairfield is 567 with 43.9% male and 56.1% female. Children under age 5 represent 4.1% of the population, under age 18 equal 25.2% of the population and over age 65 is 15.0% of the population. The median household income is $37,054, per capita income is $29,601. There are a total of 175 housing units with 77.1% owner occupied. Education includes 27.4% of residents that are high school graduates and 25.1% with a bachelor's degree or higher. The average temperature in Fairfield in the summer is 64 degrees, and in the winter 24 degrees.