ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2021) |
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| Palermo | Standard | $506,450 |
| Frankfort | Standard | $174,020 |
| Winterport | Standard | $328,100 |
| Islesboro | Standard | $450,550 |
| Lincolnville | Standard | $421,770 |
| Belfast | Standard | $380,100 |
| Brooks | Standard | $174,870 |
| Burnham | Standard | $156,130 |
| Freedom | Standard | $406,750 |
| Liberty | Standard | $337,200 |
| Monroe | Standard | $166,130 |
| Morrill | Standard | $330,170 |
| Searsmont | Standard | $759,000 |
| Searsport | Standard | $516,250 |
| Stockton Springs | Standard | $636,270 |
| Thorndike | Standard | $180,730 |
| Troy | Standard | $145,200 |
| Unity | Standard | $145,870 |
Source: US Internal Revenue Service