Walnut grove is located in Greene county Missouri with a geographic area of 0.6 square miles. The total population in Walnut grove is 528 with 51.7% male and 48.3% female. Children under age 5 represent 5.9% of the population, under age 18 equal 17.0% of the population and over age 65 is 19.9% of the population. The median household income is $45,573, per capita income is $22,357. There are a total of 265 housing units with 61.1% owner occupied. Education includes 47.2% of residents that are high school graduates and 8.7% with a bachelor's degree or higher. The average temperature in Walnut grove in the summer is 77 degrees, and in the winter 32 degrees.
