| ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2020) |
|---|
| Darien | Standard | $64,940 |
| Whitewater | Standard | $61,270 |
| Albany | Standard | $63,480 |
| Avalon | Standard | $68,310 |
| Beloit | Standard | $50,040 |
| Brodhead | Standard | $58,390 |
| Brooklyn | Standard | $89,370 |
| Clinton | Standard | $67,140 |
| Edgerton | Standard | $68,990 |
| Evansville | Standard | $69,770 |
| Fort Atkinson | Standard | $64,550 |
| Janesville | Standard | $72,590 |
| Janesville | Standard | $62,530 |
| Janesville | Standard | $55,300 |
| Milton | Standard | $76,550 |
| Orfordville | Standard | $61,850 |
| Sharon | Standard | $52,180 |
Source: US Internal Revenue Service