The median income of Penobscot County residents was $25,832 per year, adjusted for inflation. It had 62,156 households with a population of 151,774.
The county with the highest median resident income in the state was Cumberland County with $35,560 per year after adjusting for inflation – $9,728 more than Penobscot County. It had 120,644 households with a population of 292,307.
The county with the lowest median resident income in the state was Piscataquis County with $21,687 per year after adjusting for inflation – $4,145 less than Penobscot County. It had 7,025 households with a population of 16,836.
Maine counties by earnings per resident (2019)
| Rank | County | Earnings per resident |
|---|---|---|
| 1 | Cumberland County | $35,560 |
| 2 | Sagadahoc County | $33,990 |
| 3 | York County | $32,822 |
| 4 | Androscoggin County | $30,206 |
| 5 | Lincoln County | $29,871 |
| 6 | Hancock County | $29,700 |
| 7 | Knox County | $29,602 |
| 8 | Kennebec County | $29,341 |
| 9 | Waldo County | $27,241 |
| 10 | Penobscot County | $25,832 |
| 11 | Franklin County | $25,350 |
| 12 | Oxford County | $24,424 |
| 13 | Aroostook County | $22,893 |
| 14 | Washington County | $22,871 |
| 15 | Somerset County | $22,511 |
| 16 | Piscataquis County | $21,687 |
* All values are inflation-adjusted
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