ZIP Code 18109 is located in the county of Lehigh in the state of Pennsylvania. 18109 ZIP Code is spread between the coordinates of +40.6209235 Latitude and -75.43815856 Longitude. 18109 ZIP Code is part of the 484, 61 area code. There are 0 postal offices in zip code 18109.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 18109. Always when you mail a package or a letter, be attentive to mention the preferred or acceptable cities. Using any city in the list of unacceptable cities may result in unforseen delays.