It’s no secret that California is resident to a number of rich folks. But what counties are home to the highest-paid residents? You may be surprised where on the list some Southern California counties rank.

Marin County ($91, 483) has the highest per capita income of any county in California, according to a 2009 study by the Department of Commerce. The county just north of the Golden Gate Bridge is the fifth highest in the country.

The Bay Area represented well nationwide, also included in the ranking is No. 8 San Mateo ($71,753), No. 10 San Francisco ($71,342) and No. 28 Santa Clara.

There were no Southern California cities that made the Top 30 in the study.

Too get an idea of where on the list a Southern California county ranks, a previous study from the Bureau of Economic Analysis goes a bit deeper.

Orange County ($50,463) ranks as the highest in Southern California but still just at No. 78 nationwide.

Here is a look at the Top 30 Counties in the 2009 Department of Commerce study.

1 Teton, Wyoming $132,728
2 New York, New York $120,790
3 Loving, Texas $99,593
4 Pitkin, Colorado $93,465
5 Marin, California $91,483
6 Fairfield, Connecticut $81,576
7 Westchester, New York $74,878
8 San Mateo, California $71,753
9 Morris, New Jersey $71,713
10 San Francisco, California $71,342
11 Somerset, New Jersey $70,949
12 Alexandria City, Virginia $70,632
13 Arlington, Virginia $68,270
14 Fairfax, Virginia $67,909
15 Montgomery, Maryland $67,525
16 Bergen, New Jersey $67,125
17 Hunterdon, New Jersey $66,449
18 Sully, North Dakota $64,352
19 Blaine, Idaho $64,207
20 Collier, Florida $63,276
21 Nassau, New York $62,981
22 District of Columbia $62,484
23 Norfolk, Massachusetts $62,129
24 Montgomery, Pennsylvania $62,086
25 Martin, Florida $61,868
26 Sublette, Wyoming $61,411
27 Monroe, Florida $61,216
28 Santa Clara, California $60,107
29 Ozaukee, Wisconsin $60,059
30 Indian River, Florida $59,419