Intro
Discover the Keystone States postal landscape with our comprehensive guide to Pennsylvania zip codes. Explore the states 67 counties, 2,560 zip codes, and 6,414 cities, towns, and boroughs. Learn how to navigate PAs zip code map, find zip codes by city or county, and understand the importance of accurate zip code usage in the United States.
Pennsylvania, known as the Keystone State, is a vast and populous state in the northeastern United States. With a rich history, diverse culture, and breathtaking landscapes, Pennsylvania attracts millions of visitors and new residents each year. One of the most essential pieces of information for anyone moving to or exploring Pennsylvania is understanding its zip code system. In this comprehensive guide, we'll delve into the world of Pennsylvania zip codes, exploring their history, structure, and practical uses.
History of Pennsylvania Zip Codes

The United States Postal Service (USPS) introduced the zip code system in 1963 to improve mail sorting and delivery efficiency. Pennsylvania, being one of the original 13 colonies, has a long history of postal service dating back to the 18th century. As the state's population grew, so did the need for a more efficient mail system. The introduction of zip codes revolutionized the way mail was sorted and delivered, making it faster and more accurate.
Structure of Pennsylvania Zip Codes

Pennsylvania zip codes follow the standard USPS format, consisting of five digits. The first digit represents the region, the next two digits represent the sectional center facility, and the final two digits represent the post office or delivery area. Some Pennsylvania zip codes also include an additional four-digit code, known as the ZIP+4 code, which further narrows down the delivery area.
Pennsylvania Zip Code Ranges
Pennsylvania zip codes range from 15001 to 19640, covering the entire state. The zip codes are divided into several ranges, each corresponding to a specific region or city. For example:
- 15000-15499: Western Pennsylvania, including Pittsburgh and surrounding areas
- 15500-15999: Central Pennsylvania, including State College and surrounding areas
- 16000-16499: Northern Pennsylvania, including Erie and surrounding areas
- 16500-16999: Northwestern Pennsylvania, including Meadville and surrounding areas
- 17000-17999: Central Pennsylvania, including Harrisburg and surrounding areas
- 18000-18999: Eastern Pennsylvania, including Allentown and surrounding areas
- 19000-19999: Southeastern Pennsylvania, including Philadelphia and surrounding areas
Practical Uses of Pennsylvania Zip Codes

Pennsylvania zip codes have numerous practical uses, including:
- Mail and Package Delivery: Zip codes ensure that mail and packages are delivered to the correct address.
- Geographic Identification: Zip codes can identify specific geographic areas, such as cities, towns, or neighborhoods.
- Demographic Analysis: Zip codes can be used to analyze demographic data, such as population density, income levels, and education levels.
- Marketing and Advertising: Zip codes can be used to target specific audiences for marketing and advertising campaigns.
- Emergency Services: Zip codes can help emergency services, such as police and fire departments, quickly respond to emergencies.
Interesting Facts About Pennsylvania Zip Codes
- The most populous zip code in Pennsylvania is 19107, which covers the city of Philadelphia.
- The largest zip code in Pennsylvania is 19403, which covers the city of Lansdale and surrounding areas.
- The smallest zip code in Pennsylvania is 16801, which covers the city of State College.
Common Pennsylvania Zip Codes

Here are some common Pennsylvania zip codes:
- 15213: Pittsburgh
- 17011: Harrisburg
- 19102: Philadelphia
- 19403: Lansdale
- 16801: State College
Pennsylvania Zip Code Map

A Pennsylvania zip code map can be a useful tool for navigating the state's complex zip code system. The map displays the various zip code ranges and their corresponding geographic areas.
Conclusion
Pennsylvania zip codes play a vital role in the state's mail and package delivery system. Understanding the structure and practical uses of Pennsylvania zip codes can help residents and visitors navigate the state more efficiently. Whether you're moving to Pennsylvania or simply exploring its many attractions, knowing the zip code system can make a big difference.What is the most populous zip code in Pennsylvania?
+The most populous zip code in Pennsylvania is 19107, which covers the city of Philadelphia.
How many digits do Pennsylvania zip codes have?
+Pennsylvania zip codes have five digits, with an optional additional four-digit code (ZIP+4 code) for more precise delivery.
What is the purpose of Pennsylvania zip codes?
+Pennsylvania zip codes are used for mail and package delivery, geographic identification, demographic analysis, marketing and advertising, and emergency services.
We hope this comprehensive guide to Pennsylvania zip codes has been informative and helpful. If you have any further questions or need assistance with navigating the state's zip code system, please don't hesitate to ask. Share your thoughts and experiences with Pennsylvania zip codes in the comments below!