From a total population of 65,491, Rapid City has a median age of 36.2. The average age of males, in Rapid City, is 34.5 while the average age of females is 38.1. When you compare this to median age of South Dakota, Rapid City is 0.6 years younger.
The median income of individuals, in Rapid City, is $25,983 while the average household income is $46,392. When comparing the median income of people living in Rapid City to the rest of South Dakota, the average income in Rapid City is $328 less.