| City: | Sunnyvale, California |
| City Alias: | Onizuka AFB |
| County: | Santa Clara County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:50:39 AM |
| Population: | No Population Data |
| Area Codes: | 341 / 408 / 510 / 650 / 669 |
| Classification: | PO Box |
| Coordinates: | 37.3688, -122.0353 |
| Quick Link: |
ZIP 94088 serves the former Onizuka Air Force Base in Sunnyvale, California, now part of the NASA Ames Research Center complex. This isn't a residential community. It's a government and aerospace facility cluster with 661 PO Boxes and 203 business delivery points but zero permanent residents.
The ZIP maintains the Onizuka AFB name as a recognized mailing alias, though the Air Force facility was closed in 2010 and transferred to NASA. Today the site houses NASA operations, aerospace contractors, and technology companies. Mail delivery focuses on two primary addresses: East Java Drive (460 delivery points) and North Mary Avenue (19 points), both serving multi-unit office and laboratory buildings.
With 14 business establishments employing 45 people according to census records, this ZIP functions as a specialized government and aerospace operations zone rather than a traditional community. The high ratio of PO Boxes to business delivery points (661 to 203) indicates that many boxes serve contractors, researchers, and organizations that maintain a mailing presence at the facility.
This is classified as a PO Box ZIP, but street delivery does exist for the facility buildings. Sunnyvale's residential population receives mail through neighboring standard ZIP codes like 94089, which geographically encloses this point location.
Mail can be addressed using either "Sunnyvale, CA 94088" or "Onizuka AFB, CA 94088." Both names are valid for mailing purposes. Most organizations at the facility use PO Box addresses, though building-specific delivery to East Java Drive is also available.
Only two streets serve the entire ZIP, both with multi-unit designations indicating office and laboratory buildings rather than residential addresses.
ZIP Code 94088 supports both business and residential activity. According to the Business Census (2024), there are 12 business establishments, employing about 576 people with an annual payroll of $23,599,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 3,713Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 12Source: CBP |
| 1st Quarter Payroll: | $6,201,000Source: CBP |
| Annual Payroll: | $23,599,000Source: CBP |
| # of Employees: | 576Source: CBP |
ZIP Code 94088 is located in Santa Clara County, California, within the San Jose-Sunnyvale-Santa Clara, CA Metropolitan Statistical Area (CBSA 41940) and California's 17th Congressional District. This Metro area has a population of 1,836,911 people, about 0.00% of whom live in ZIP Code 94088. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | San Jose-Sunnyvale-Santa Clara, CASource: Census |
| CBSA Number: | 41940Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 1,836,911Source: Census |
| MSA: | San Francisco-Oakland-San Jose, CA CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 17Source: USPS |
| Congressional Land Area: | 184.85 sq miSource: Census |
| PMSA: | San Jose, CA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0677000Source: Census |
| Place Name: | Sunnyvale city; CaliforniaSource: Census |
We could not locate which school district 94088 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.