From a total population of 139,253, Napa County has a median age of 40.3. The average age of males, in Napa County, is 39.3 while the average age of females is 41.2. When you compare this to median age of California, Napa County is 4.7 years older.
The median income of individuals, in Napa County, is $35,092 while the average household income is $70,925. When comparing the median income of people living in Napa County to the rest of California, the average income in Napa County is $5,186 more.