| City: | Northridge, California |
| City Alias: | Porter Ranch |
| County: | Los Angeles County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 10:04:52 PM |
| Population: | No Population Data |
| Area Codes: | 747 / 818 |
| Classification: | PO Box |
| Coordinates: | 34.2284, -118.5356 |
| Quick Link: |
ZIP 91327 isn't a neighborhood you can visit. It's a PO Box-only ZIP code serving the Porter Ranch and Northridge communities in the northwest San Fernando Valley. The post office sits on Rinaldi Street and provides 452 PO Boxes to local residents and 254 businesses. This ZIP exists entirely within the boundaries of 91326, which handles regular street delivery for the surrounding area.
Porter Ranch is one of the master-planned communities in Los Angeles, and many residents and businesses here choose PO Boxes for privacy, package security, or business purposes. The USPS accepts both "Northridge" and "Porter Ranch" as valid city names for this ZIP code. Unlike isolated rural post offices, this one operates in a dense suburban setting where street delivery is readily available through neighboring ZIP codes. The PO Box service here is a convenience, not a necessity.
All delivery records are associated with the post office location on Rinaldi Street.
ZIP Code 91327 supports both business and residential activity. According to the Business Census (2024), there are 7 business establishments, employing about 5 people with an annual payroll of $371,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 1,935Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 7Source: CBP |
| 1st Quarter Payroll: | $82,000Source: CBP |
| Annual Payroll: | $371,000Source: CBP |
| # of Employees: | 5Source: CBP |
ZIP Code 91327 is located in Los Angeles County, California, within the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area (CBSA 31080) and California's 27th Congressional District. This Metro area has a population of 13,012,469 people, about 0.00% of whom live in ZIP Code 91327, 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: | 13,012,469Source: Census |
| MSA: | Los Angeles-Riverside-Orange County, CASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 27Source: USPS |
| Congressional Land Area: | 699.9 sq miSource: Census |
| PMSA: | Los Angeles-Long Beach, CA 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 91327 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 January 1, 2026.