Allentown, Pennsylvania ZIP Codes
- ZIP records
7 - Sum of listed ZIP population estimates
179,222 - Counties represented
1 - Population range
6,120–51,001 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 | 18102 | Allentown | Lehigh | 51,001 |
| 2 | 18103 | Allentown | Lehigh | 48,746 |
| 3 | 18104 | Allentown | Lehigh | 48,683 |
| 4 | 18109 | Allentown | Lehigh | 18,446 |
| 5 | 18106 | Allentown | Lehigh | 6,226 |
| 6 | 18101 | Allentown | Lehigh | 6,120 |
Counties represented
All ZIP Codes in Allentown
- ZIP 18101 — Lehigh County
- ZIP 18102 — Lehigh County
- ZIP 18103 — Lehigh County
- ZIP 18104 — Lehigh County
- ZIP 18106 — Lehigh County
- ZIP 18109 — Lehigh County
- ZIP 18195 — Lehigh County
Browse all ZIP data for Pennsylvania
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.