Richland County, Illinois ZIP Codes
- ZIP records
6 - Cities represented
6 - Sum of listed ZIP population estimates
15,733
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 62450 | Olney | 12,327 |
| 2 | 62868 | Noble | 1,463 |
| 3 | 62425 | Dundas | 838 |
| 4 | 62452 | Parkersburg | 387 |
| 5 | 62421 | Claremont | 366 |
| 6 | 62419 | Calhoun | 352 |
Cities in Richland County
ZIP Directory
Browse all ZIP data for Illinois
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.