From a total population of 491,790, Sonoma County has a median age of 40.5. The average age of males, in Sonoma County, is 38.9 while the average age of females is 42.2. When you compare this to median age of California, Sonoma County is 4.9 years older.
The median income of individuals, in Sonoma County, is $33,361 while the average household income is $63,799. When comparing the median income of people living in Sonoma County to the rest of California, the average income in Sonoma County is $3,455 more.