| City: | Pasadena, California |
| County: | Los Angeles County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:35:32 AM |
| Population: | No Population Data |
| Area Codes: | 323 / 626 / 738 |
| Classification: | PO Box |
| Coordinates: | 34.1478, -118.1436 |
| Quick Link: |
ZIP Code 91109 serves the Pasadena Processing and Distribution Center, one of the USPS's major mail sorting facilities in Los Angeles County. This isn't a residential ZIP code. It's assigned to the P&DC complex on Lincoln Avenue, where 7,424 employees work at just 31 establishments. The facility handles mail for much of the San Gabriel Valley.
The 1,756 PO Boxes here aren't for neighborhood residents. They serve businesses, organizations, and individuals who want a Pasadena address tied to this central mail hub. With 675 business delivery points, commercial mail users dominate the customer base. The building names in the ZIP+4 records read like an org chart: Plant Manager, Distribution Operations, Vehicle Maintenance Facility, Transportation Networks.
Two notable institutions share this ZIP code: Caltech and NASA's Jet Propulsion Laboratory. The "CAL INST TECH CPU" and "CAL TECH EMPLOYEES FCU" entries point to the California Institute of Technology's campus post unit. "J P L" refers to the Jet Propulsion Laboratory, the NASA research center managed by Caltech. Both institutions have deep roots in Pasadena and use this ZIP for certain mail functions.
This ZIP exists as a point location (MultiPoint geometry) within the boundaries of ZIP 91103. It has no residential population and no census data. City delivery is available, but the 3 distinct city carrier routes here serve the P&DC and associated facilities rather than homes. General Delivery is also offered for transient mail pickup.
Lincoln Avenue is the P&DC's physical address, with 365 unit records for different departments and operations sections.
ZIP Code 91109 supports both business and residential activity. According to the Business Census (2024), there are 30 business establishments, employing about 7,736 people with an annual payroll of $1,095,287,000. USPS data shows 0 residential mailboxes and 1 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 1Source: USPS |
| Total Delivery Receptacles: | 2,301Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 30Source: CBP |
| 1st Quarter Payroll: | $291,872,000Source: CBP |
| Annual Payroll: | $1,095,287,000Source: CBP |
| # of Employees: | 7,736Source: CBP |
ZIP Code 91109 is located in Los Angeles County, California, within the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area (CBSA 31080) and California's 28th Congressional District. This Metro area has a population of 0 people, about 0.00% of whom live in ZIP Code 91109, and is subdivided into the Los Angeles-Long Beach-Glendale, CA division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Los Angeles-Long Beach-Anaheim, CASource: Census |
| CBSA Number: | 31080Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Los Angeles-Long Beach-Glendale, CA (CBSA Div 31084)Source: Census |
| CBSA Population: | 0Source: Census |
| MSA: | Los Angeles-Riverside-Orange County, CASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 28Source: USPS |
| Congressional Land Area: | 218.45 sq miSource: Census |
| PMSA: | Los Angeles-Long Beach, CA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0656000Source: Census |
| Place Name: | Pasadena city; CaliforniaSource: Census |
We could not locate which school district 91109 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.