| City: | Lehigh Valley, Pennsylvania |
| Names to Avoid: | Business Reply Mail |
| County: | Northampton County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:35:47 PM |
| Population: | No Population Data |
| Area Codes: | 484 / 610 / 835 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 40.6428, -75.4328 |
| Quick Link: |
ZIP code 18003 serves as a dedicated Business Reply Mail (BRM) designation for the Lehigh Valley region in Northampton County, Pennsylvania. Business Reply Mail is a USPS service that allows businesses to receive return mail without requiring customers to pay postage. This specialized ZIP processes prepaid return mail for companies participating in the BRM program throughout the Allentown-Bethlehem metropolitan area.
Located approximately 3.5 miles from Allentown's Eastside neighborhood, this designation supports commercial mail operations in the region. The Lehigh Valley Processing and Distribution Center near Lehigh Valley International Airport handles mail processing for the area. With 4 ZIP+4 codes on file and 11 business delivery points, this is a focused commercial designation. The USPS has maintained this unique postal code for over two decades. Lehigh Valley is the valid mailing city for this designation.
| Residential: | 0 |
| Business: | 11 |
ZIP Code 18003 is assigned to a single organization or institution. Detailed business demographics are not published for unique ZIP Codes.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 11Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 18003 is located in Northampton County, Pennsylvania, within the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area (CBSA 10900) and Pennsylvania's 7th Congressional District. This Metro area has a population of 821,173 people, about 0.00% of whom live in ZIP Code 18003. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Allentown-Bethlehem-Easton, PA-NJSource: Census |
| CBSA Number: | 10900Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 821,173Source: Census |
| MSA: | Allentown-Bethlehem-Easton, PA MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 07Source: USPS |
| Congressional Land Area: | 862.56 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 18003 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.