| ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2021) |
|---|
| Esmond | Standard | $132,130 |
| Ashton | Standard | $352,600 |
| Baileyville | Standard | $181,130 |
| Byron | Standard | $350,920 |
| Chana | Standard | $314,800 |
| Davis Junction | Standard | $253,050 |
| Dixon | Standard | $383,070 |
| Forreston | Standard | $365,850 |
| Franklin Grove | Standard | $256,130 |
| German Valley | Standard | $145,680 |
| Leaf River | Standard | $314,270 |
| Lindenwood | Standard | $172,090 |
| Milledgeville | Standard | $163,870 |
| Monroe Center | Standard | $302,570 |
| Mount Morris | Standard | $319,600 |
| Oregon | Standard | $338,650 |
| Polo | Standard | $302,070 |
| Rochelle | Standard | $352,250 |
| Shannon | Standard | $375,900 |
| Stillman Valley | Standard | $327,890 |
| Rockford | Standard | $315,120 |
Source: US Internal Revenue Service