1 Santa Clara County, $140,258
2 San Mateo County, $136,837
3 Marin County, $131,008
4 San Francisco County, $126,187
5 Alameda County, $112,017
6 Contra Costa County, $110,455
7 Orange County County), $100,485
8 Placer County, $99,734
9 Napa County, $97,498
10 Santa Cruz County, $96,093