California Gazetteer
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
| County | Wealth Index | |
|---|---|---|
| 1. | Marin County | 219 |
| 2. | San Mateo County | 216 |
| 3. | Santa Clara County | 197 |
| 4. | Contra Costa County | 190 |
| 5. | Napa County | 164 |
| 6. | Alameda County | 160 |
| 7. | Placer County | 159 |
| 8. | San Francisco County | 153 |
| 9. | Orange County | 152 |
| 10. | El Dorado County | 149 |
| 11. | Santa Cruz County | 149 |
| 12. | Nevada County | 145 |
| 13. | Ventura County | 142 |
| 14. | Sonoma County | 138 |
| 15. | Alpine County | 138 |
| 16. | Santa Barbara County | 128 |
| 17. | San Benito County | 125 |
| 18. | San Diego County | 123 |
| 19. | San Luis Obispo County | 122 |
| 20. | Solano County | 119 |
