Walker is located in Linn county Iowa with a geographic area of 0.7 square miles. The total population in Walker is 888 with 47.5% male and 52.5% female. Children under age 5 represent 6.2% of the population, under age 18 equal 26.6% of the population and over age 65 is 11.9% of the population. The median household income is $74,375, per capita income is $29,254. There are a total of 320 housing units with 93.1% owner occupied. Education includes 35.9% of residents that are high school graduates and 20.0% with a bachelor's degree or higher. The average temperature in Walker in the summer is 71 degrees, and in the winter 23 degrees.