| City: | Southeastern, Pennsylvania |
| County: | Chester County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:46:00 PM |
| Population: | No Population Data |
| Area Codes: | 484 / 610 / 835 |
| Classification: | PO Box |
| Coordinates: | 39.9833, -75.5125 |
| Quick Link: |
ZIP 19399 serves the Southeastern Pennsylvania Processing & Distribution Center, a major USPS mail processing facility in Chester County. This isn't a residential community. It's an industrial postal campus where mail gets sorted, processed, and distributed across the region.
The facility houses 194 business delivery points, all located at W Valley Road. These aren't typical businesses. The 63 named departments include bulk mail acceptance units, maintenance operations, transportation networks, and administrative offices like human resources, labor relations, and employee assistance programs. Each department has its own delivery point within the facility.
The post office maintains 186 PO Boxes at this location, likely serving USPS employees and contractors who work at the facility. With zero residential population and no households in the ZIP's territory, this is classified as a PO Box Only Zone. The facility operates within a point location (no defined area) and is geographically contained within the boundaries of ZIP 19087.
This ZIP code represents the behind-the-scenes infrastructure of mail delivery. While most people never see this address on their mail, it's where thousands of pieces pass through daily on their way to homes and businesses throughout southeastern Pennsylvania.
All delivery points concentrate at W Valley Road, where the USPS processing facility subdivides into 193 unit addresses for different departments and operations.
ZIP Code 19399 supports both business and residential activity. According to the Business Census (2024), there are 7 business establishments, employing about 15 people with an annual payroll of $916,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 387Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 7Source: CBP |
| 1st Quarter Payroll: | $250,000Source: CBP |
| Annual Payroll: | $916,000Source: CBP |
| # of Employees: | 15Source: CBP |
ZIP Code 19399 is located in Chester County, Pennsylvania, within the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area (CBSA 37980) and Pennsylvania's 6th Congressional District. This Metro area has a population of 5,965,343 people, about 0.00% of whom live in ZIP Code 19399, and is subdivided into the Montgomery County-Bucks County-Chester County, PA division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Philadelphia-Camden-Wilmington, PA-NJ-DE-MDSource: Census |
| CBSA Number: | 37980Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Montgomery County-Bucks County-Chester County, PA (CBSA Div 33874)Source: Census |
| CBSA Population: | 5,965,343Source: Census |
| MSA: | Philadelphia-Wilmington-Atlantic City, PA-NJ-DE-MD CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 06Source: USPS |
| Congressional Land Area: | 860.47 sq miSource: Census |
| PMSA: | Philadelphia, PA-NJ PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 19399 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 March 1, 2026.