New Castle, Pennsylvania ZIP Codes
- ZIP records
3 - Sum of listed ZIP population estimates
51,114 - Counties represented
1 - Population range
4,929–30,767 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 | 16101 | New Castle | Lawrence | 30,767 |
| 2 | 16105 | New Castle | Lawrence | 15,418 |
| 3 | 16102 | New Castle | Lawrence | 4,929 |
Counties represented
All ZIP Codes in New Castle
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.