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