| City: | Pasadena, California |
| Names to Avoid: | Cal Tech |
| County: | Los Angeles County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:35:41 AM |
| Population: | No Population Data |
| Area Codes: | 323 / 626 / 738 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 34.1478, -118.1436 |
| Quick Link: |
The California Institute of Technology maintains ZIP code 91126 as a secondary unique postal designation in Pasadena, Los Angeles County. Caltech, as the institution is commonly known, was founded in 1891 by Amos G. Throop and ranks among the world's most prestigious science and engineering universities. This ZIP operates alongside 91125, Caltech's primary unique ZIP, to handle the institution's substantial correspondence volume. The designation has served the university for over two decades.
Located in Pasadena's South Lake neighborhood, Caltech's 124-acre campus is home to approximately 2,400 students and manages NASA's Jet Propulsion Laboratory. Only 4 ZIP+4 codes route through this designation, suggesting it handles specialized administrative or research correspondence rather than general campus mail. Census demographic data is not recorded for this ZIP. Pasadena serves as the valid mailing city.
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 91126 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: | 0Source: 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 91126 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 91126, 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 91126 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.