Fairfield is located in Utah county Utah with a geographic area of 26.1 square miles. The total population in Fairfield is 81 with 48.1% male and 51.9% female. Children under age 5 represent 7.4% of the population, under age 18 equal 17.3% of the population and over age 65 is 18.5% of the population. The median household income is $81,667, per capita income is $35,994. There are a total of 24 housing units with 100.0% owner occupied. Education includes 37.5% of residents that are high school graduates and 4.2% with a bachelor's degree or higher. The average temperature in Fairfield in the summer is 70 degrees, and in the winter 30 degrees.