| City: | Palmdale, California |
| Names to Avoid: | Lockheed Advanced Dev Co |
| County: | Los Angeles County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 10:45:17 PM |
| Population: | No Population Data |
| Area Code: | 661 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 34.6129, -118.1184 |
| Quick Link: |
Lockheed Martin's legendary Skunk Works advanced development division operates under dedicated ZIP code 93599 in Los Angeles County, California. This secretive facility at U.S. Air Force Plant 42 in Palmdale has been the birthplace of some of aviation's most revolutionary aircraft, including the U-2 spy plane, SR-71 Blackbird, F-117 Nighthawk stealth fighter, F-22 Raptor, and F-35 Lightning II. After spending the Cold War era in Burbank, the Skunk Works relocated to Site 10 at Plant 42 following 1989. This unique postal designation has served the facility for over two decades.
Postal records show just 3 ZIP+4 codes for this classified defense facility, reflecting the consolidated nature of corporate mail operations. Census Business Patterns data reveals 6 establishments employing 3,704 workers within this 0.87-square-mile postal boundary, indicating the massive scale of aerospace engineering activity. The Skunk Works workforce has grown to approximately 5,500 employees as of 2023, rivaling peak employment levels from the SR-71 production era.
The facility continues developing next-generation aircraft under classified programs. In 2021, the Skunk Works opened Building 648, the first new factory on the Palmdale site in decades. Census demographic data is not available for this ZIP, consistent with its secure industrial function. Palmdale is the valid mailing city for this designation.
| Establishments: | 6 |
| Employment: | 3,704 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 93599 supports both business and residential activity. According to the Business Census (2024), there are 9 business establishments, employing about 3,989 people with an annual payroll of $590,688,000.
| # 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: | 9Source: CBP |
| 1st Quarter Payroll: | $150,827,000Source: CBP |
| Annual Payroll: | $590,688,000Source: CBP |
| # of Employees: | 3,989Source: CBP |
ZIP Code 93599 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 93599, 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: | 0655156Source: Census |
| Place Name: | Palmdale city; CaliforniaSource: Census |
We could not locate which school district 93599 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.