| ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2020) |
|---|
| Clare | Standard | $79,900 |
| Cortland | Standard | $58,510 |
| DeKalb | Standard | $54,800 |
| Esmond | Standard | $57,600 |
| Genoa | Standard | $64,770 |
| Hampshire | Standard | $83,570 |
| Kingston | Standard | $71,820 |
| Kirkland | Standard | $62,960 |
| Malta | Standard | $62,970 |
| Maple Park | Standard | $80,350 |
| Marengo | Standard | $71,670 |
| Sycamore | Standard | $75,590 |
| Earlville | Standard | $56,790 |
| Hinckley | Standard | $69,640 |
| Lee | Standard | $60,850 |
| Leland | Standard | $64,480 |
| Sandwich | Standard | $63,040 |
| Shabbona | Standard | $68,150 |
| Somonauk | Standard | $74,260 |
| Waterman | Standard | $65,060 |
| Monroe Center | Standard | $66,750 |
| Rochelle | Standard | $56,310 |
Source: US Internal Revenue Service