Mackay is located in Custer county Idaho with a geographic area of 0.9 square miles. The total population in Mackay is 511 with 43.4% male and 56.6% female. Children under age 5 represent 4.9% of the population, under age 18 equal 25.2% of the population and over age 65 is 20.5% of the population. The median household income is $37,045, per capita income is $22,618. There are a total of 172 housing units with 70.9% owner occupied. Education includes 43.0% of residents that are high school graduates and 15.7% with a bachelor's degree or higher. The average temperature in Mackay in the summer is 60 degrees, and in the winter 24 degrees.
