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. | Franklin County | 87 |
| 2. | Hampden County | 87 |
| 3. | Suffolk County | 89 |
| 4. | Berkshire County | 97 |
| 5. | Dukes County | 102 |
| 6. | Bristol County | 104 |
| 7. | Hampshire County | 119 |
| 8. | Worcester County | 121 |
| 9. | Nantucket County | 141 |
| 10. | Essex County | 142 |
| 11. | Barnstable County | 154 |
| 12. | Plymouth County | 159 |
| 13. | Middlesex County | 176 |
| 14. | Norfolk County | 181 |
