Grain Valley is a city located in Missouri. With a 2020 population of 15,028, it is the 49th largest city in Missouri and the 2313th largest city in the United States. Grain Valley is currently growing at a rate of 1.70% annually and its population has increased by 16.91% since the most recent census, which recorded a population of 12,854 in 2010. Grain Valley reached it's highest population of 15,028 in 2021. Spanning over 6 miles, Grain Valley has a population density of 2,449 people per square mile.
The average household income in Grain Valley is $78,540 with a poverty rate of 4.91%. The median rental costs in recent years comes to $1,044 per month, and the median house value is $174,400. The median age in Grain Valley is 33.9 years, 33.8 years for males, and 34.2 years for females. For every 100 females there are 93.6 males.