Grand junction is located in Greene county Iowa with a geographic area of 1.0 square miles. The total population in Grand junction is 829 with 48.6% male and 51.4% female. Children under age 5 represent 8.6% of the population, under age 18 equal 27.6% of the population and over age 65 is 15.2% of the population. The median household income is $42,917, per capita income is $24,003. There are a total of 320 housing units with 65.9% owner occupied. Education includes 49.4% of residents that are high school graduates and 8.1% with a bachelor's degree or higher. The average temperature in Grand junction in the summer is 72 degrees, and in the winter 23 degrees.
