| ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2021) |
|---|
| Arlington | Standard | $140,330 |
| Aurora | Standard | $220,580 |
| Fairbank | Standard | $330,070 |
| Lamont | Standard | $172,300 |
| Maynard | Standard | $156,420 |
| Oelwein | Standard | $376,500 |
| Stanley | Standard | $189,300 |
| Sumner | Standard | $325,430 |
| Westgate | Standard | $137,980 |
| Castalia | Standard | $148,130 |
| Clermont | Standard | $189,100 |
| Elgin | Standard | $178,230 |
| Fayette | Standard | $385,700 |
| Fort Atkinson | Standard | $356,570 |
| Hawkeye | Standard | $190,500 |
| Ossian | Standard | $152,370 |
| Postville | Standard | $395,000 |
| Wadena | Standard | $125,770 |
| Waucoma | Standard | $187,880 |
| West Union | Standard | $374,340 |
Source: US Internal Revenue Service