100 Richest ZIP Codes in the United States in Richland County, Illinois
Explore the 100 ZIP codes with the highest median household income in the United States using U.S. Census data. This page lists ZIP codes located in Richland County, Illinois.
| Rank | ZIP Code | City | State | Median Household Income |
|---|---|---|---|---|
| 1 | 62450 | OLNEY | IL | $62,033 |
| 2 | 62868 | NOBLE | IL | $55,446 |