Chillicothe, Illinois ZIP Codes
- ZIP records
1 - Sum of listed ZIP population estimates
10,203 - Counties represented
1 - Population range
10,203–10,203 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 61523 | Chillicothe | Peoria | 10,203 |
Counties represented
All ZIP Codes in Chillicothe
Browse all ZIP data for Illinois
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.