ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2021) |
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| Buffalo Center | Standard | $461,030 |
| Corwith | Standard | $181,130 |
| Lakota | Standard | $211,540 |
| Titonka | Standard | $156,330 |
| Wesley | Standard | $161,940 |
| Algona | Standard | $391,550 |
| Armstrong | Standard | $342,550 |
| Bancroft | Standard | $545,100 |
| Bode | Standard | $172,720 |
| Burt | Standard | $183,820 |
| Fenton | Standard | $176,430 |
| Ledyard | Standard | $194,930 |
| Livermore | Standard | $197,620 |
| Lone Rock | Standard | $195,800 |
| Lu Verne | Standard | $168,950 |
| Ottosen | Standard | $82,810 |
| Swea City | Standard | $152,650 |
| West Bend | Standard | $340,150 |
| Whittemore | Standard | $180,470 |
Source: US Internal Revenue Service