Bethlehem, Pennsylvania ZIP Codes
- ZIP records
4 - Sum of listed ZIP population estimates
129,661 - Counties represented
2 - Population range
21,204–40,640 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 | 18017 | Bethlehem | Northampton | 40,640 |
| 2 | 18015 | Bethlehem | Northampton | 34,852 |
| 3 | 18018 | Bethlehem | Lehigh | 32,965 |
| 4 | 18020 | Bethlehem | Northampton | 21,204 |
Counties represented
All ZIP Codes in Bethlehem
- ZIP 18015 — Northampton County
- ZIP 18017 — Northampton County
- ZIP 18018 — Lehigh County
- ZIP 18020 — Northampton 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.