ZIP Code 18103 – Allentown, Pennsylvania | ZipsCode.us
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ZIP Code 18103
Allentown, Pennsylvania · Lehigh
ZIP code 18103 belongs to the city of Allentown in Pennsylvania (Lehigh). See all Pennsylvania ZIP Codes.
ZIP code 18103 belongs to Allentown, Pennsylvania, in Lehigh. If you are mailing a letter or package to this area, use Allentown, PA 18103 in the address. On this page you will find the city and county for 18103, nearby ZIP codes in the same county, and free tools to look up any address in this ZIP code.
What City Is ZIP Code 18103?
The city for ZIP code 18103 is Allentown, Pennsylvania. When you write an address in this area, the correct format is: Name, Street Address, Allentown, PA 18103.
ZIP Code 18103 County and State
ZIP code 18103 is located in Lehigh, Pennsylvania. For a complete list of cities and ZIP codes across the state, see the Pennsylvania ZIP Codes page.
Nearby ZIP Codes in Lehigh
These ZIP codes are in the same county as 18103:
ZIP Code 18103 on the Map
The map below shows the approximate center of ZIP code 18103, near Allentown, Pennsylvania. You can zoom in and drag the map to explore the area.
Map center is approximate (ZIP area center, around 40.5891, -75.4645). Map data © OpenStreetMap.
Population and Demographics of ZIP Code 18103
According to public U.S. Census Bureau data, ZIP code 18103 is home to a community in Pennsylvania. The figures below come from the U.S. Census and the American Community Survey (ACS).
Source: U.S. Census Bureau, American Community Survey (ACS) 2023 5-year estimates and 2023 Gazetteer. Figures are estimates and change with each new survey.
Find an Address in ZIP Code 18103
Need the full ZIP+4 code for a specific street address in Allentown? Use the free ZIP+4 Lookup tool, or find any ZIP code from a street address with the ZIP Code by Address tool.
Frequently Asked Questions
What city is ZIP code 18103?
ZIP code 18103 is for Allentown, Pennsylvania.
What county is ZIP code 18103 in?
ZIP code 18103 is in Lehigh, Pennsylvania.
What state is ZIP code 18103 in?
ZIP code 18103 is in Pennsylvania (PA).
How do I find the ZIP+4 for an address in 18103?
Use the free ZIP+4 Lookup tool with the full street address to get the complete 9-digit ZIP code.
What are the nearby ZIP codes to 18103?
Nearby ZIP codes include 18011 (Alburtis), 18025 (Bethlehem), 18031 (Breinigsville), 18032 (Catasauqua), 18034 (Center Valley).
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