| ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2021) |
|---|
| La Porte City | Standard | $342,090 |
| Atkins | Standard | $351,600 |
| Belle Plaine | Standard | $337,930 |
| Blairstown | Standard | $181,820 |
| Brandon | Standard | $173,340 |
| Center Point | Standard | $370,730 |
| Dysart | Standard | $568,780 |
| Elberon | Standard | $193,100 |
| Fairfax | Standard | $329,140 |
| Garrison | Standard | $154,620 |
| Keystone | Standard | $159,330 |
| Luzerne | Standard | $141,930 |
| Marengo | Standard | $332,260 |
| Mount Auburn | Standard | $148,130 |
| Newhall | Standard | $137,760 |
| Norway | Standard | $187,650 |
| Palo | Standard | $302,830 |
| Shellsburg | Standard | $296,280 |
| Urbana | Standard | $310,830 |
| Van Horne | Standard | $430,850 |
| Vinton | Standard | $335,330 |
| Walford | Standard | $377,850 |
| Walker | Standard | $290,840 |
| Watkins | Standard | $158,500 |
Source: US Internal Revenue Service