From a total population of 12,232, Grass Valley has a median age of 46.7. The average age of males, in Grass Valley, is 36.1 while the average age of females is 54.3. When you compare this to median age of California, Grass Valley is 11.1 years older.
The median income of individuals, in Grass Valley, is $23,005 while the average household income is $33,325. When comparing the median income of people living in Grass Valley to the rest of California, the average income in Grass Valley is $6,901 less.