From a total population of 256,802, Marin County has a median age of 45.1. The average age of males, in Marin County, is 43.5 while the average age of females is 46.5. When you compare this to median age of California, Marin County is 9.5 years older.
The median income of individuals, in Marin County, is $58,004 while the average household income is $91,529. When comparing the median income of people living in Marin County to the rest of California, the average income in Marin County is $28,098 more.