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. | Aroostook County | 49 |
| 2. | Somerset County | 52 |
| 3. | Washington County | 52 |
| 4. | Piscataquis County | 53 |
| 5. | Waldo County | 59 |
| 6. | Oxford County | 59 |
| 7. | Penobscot County | 63 |
| 8. | Franklin County | 66 |
| 9. | Androscoggin County | 68 |
| 10. | Kennebec County | 70 |
| 11. | Sagadahoc County | 78 |
| 12. | Knox County | 86 |
| 13. | Hancock County | 87 |
| 14. | Lincoln County | 90 |
| 15. | York County | 96 |
| 16. | Cumberland County | 119 |
