ZIP Code 18103
Allentown · Lehigh, Pennsylvania
18103 is the ZIP code of Allentown in Lehigh, Pennsylvania, United States.
- ZIP Code
- 18103
- County
- Lehigh
- State
- Pennsylvania
- Country
- United States
Place with ZIP code 18103
| Place | County | Location |
|---|---|---|
| Allentown | Lehigh | 40.589, -75.465 |
Near Philadelphia
The nearest major city is Philadelphia, about 75 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 18103?
Allentown.
Which county and state is 18103 in?
Lehigh, Pennsylvania, United States.
What is the nearest major city to 18103?
Philadelphia, about 75 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.