California Gazetteer
| Name | County | Average Household Income | |
|---|---|---|---|
| 1. | Town of Atherton | San Mateo | $616,001 |
| 2. | Town of Hillsborough | San Mateo | $533,208 |
| 3. | Town of Portola Valley | San Mateo | $479,140 |
| 4. | City of Rolling Hills | Los Angeles | $470,623 |
| 5. | Town of Los Altos Hills | Santa Clara | $457,153 |
| 6. | City of Monte Sereno | Santa Clara | $454,957 |
| 7. | City of Belvedere | Marin | $450,674 |
| 8. | West Menlo Park Census Designated Place | San Mateo | $448,869 |
| 9. | Emerald Lake Hills Census Designated Place | San Mateo | $443,084 |
| 10. | Town of Woodside | San Mateo | $441,692 |
| 11. | City of Hidden Hills | Los Angeles | $432,652 |
| 12. | Town of Ross | Marin | $411,759 |
| 13. | City of Los Altos | Santa Clara | $410,612 |
| 14. | Sleepy Hollow Census Designated Place | Marin | $405,581 |
| 15. | Loyola Census Designated Place | Santa Clara | $403,994 |
| 16. | City of Orinda | Contra Costa | $386,818 |
| 17. | City of Saratoga | Santa Clara | $373,810 |
| 18. | Alamo Census Designated Place | Contra Costa | $370,785 |
| 19. | Kentfield Census Designated Place | Marin | $368,253 |
| 20. | Highlands Census Designated Place | San Mateo | $367,357 |
