Rockford, Illinois ZIP Codes
- ZIP records
9 - Sum of listed ZIP population estimates
178,711 - Counties represented
1 - Population range
152–30,765 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 | 61107 | Rockford | Winnebago | 30,765 |
| 2 | 61108 | Rockford | Winnebago | 30,355 |
| 3 | 61109 | Rockford | Winnebago | 26,768 |
| 4 | 61103 | Rockford | Winnebago | 22,869 |
| 5 | 61101 | Rockford | Winnebago | 19,318 |
| 6 | 61104 | Rockford | Winnebago | 17,222 |
| 7 | 61102 | Rockford | Winnebago | 15,937 |
| 8 | 61114 | Rockford | Winnebago | 15,325 |
| 9 | 61112 | Rockford | Winnebago | 152 |
Counties represented
All ZIP Codes in Rockford
- ZIP 61101 — Winnebago County
- ZIP 61102 — Winnebago County
- ZIP 61103 — Winnebago County
- ZIP 61104 — Winnebago County
- ZIP 61107 — Winnebago County
- ZIP 61108 — Winnebago County
- ZIP 61109 — Winnebago County
- ZIP 61112 — Winnebago County
- ZIP 61114 — Winnebago County
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.