From a total population of 10,352, Grain Valley has a median age of 36.4. The average age of males, in Grain Valley, is 35.2 while the average age of females is 37.7. When you compare this to median age of Missouri, Grain Valley is 1.7 years younger.
The median income of individuals, in Grain Valley, is $26,328 while the average household income is $46,917. When comparing the median income of people living in Grain Valley to the rest of Missouri, the average income in Grain Valley is $322 more.