| City: | Duarte, California |
| County: | Los Angeles County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:35:11 AM |
| Population: | No Population Data |
| Area Code: | 626 |
| Classification: | PO Box |
| Coordinates: | 34.1397, -117.9765 |
| Quick Link: |
ZIP code 91009 serves a single location in Duarte, California, in the San Gabriel Valley of Los Angeles County. It's a point ZIP with no geographic territory of its own. Instead, it exists as a dedicated postal zone within the larger 91010 ZIP that surrounds it.
The Duarte post office at Highland Avenue maintains 370 PO Boxes at this location. All 134 ZIP+4 street records point to this same address on Highland Ave, using UNIT designators for differentiation. Five businesses operate here, employing 26 workers. The single city carrier route confirms this is a concentrated facility rather than a delivery area.
Residents and businesses in Duarte typically receive street delivery through the standard 91010 ZIP code. The 91009 ZIP exists specifically for PO Box customers who prefer or require a dedicated box for their mail. This isn't a PO Box Only Zone, so local addresses have full carrier delivery available through the sibling ZIP.
Duarte sits at the base of the San Gabriel Mountains, surrounded by neighboring communities including Monrovia, Baldwin Park, Arcadia, and El Monte. The 91009 ZIP serves customers from across these nearby areas who want PO Box service at the Duarte facility.
All delivery records point to Highland Avenue, the post office location.
ZIP Code 91009 supports both business and residential activity. According to the Business Census (2024), there are 4 business establishments, employing about 21 people with an annual payroll of $969,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 508Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 4Source: CBP |
| 1st Quarter Payroll: | $232,000Source: CBP |
| Annual Payroll: | $969,000Source: CBP |
| # of Employees: | 21Source: CBP |
ZIP Code 91009 is located in Los Angeles County, California, within the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area (CBSA 31080) and California's 31st Congressional District. This Metro area has a population of 0 people, about 0.00% of whom live in ZIP Code 91009, 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: | 31Source: USPS |
| Congressional Land Area: | 218.24 sq miSource: Census |
| PMSA: | Los Angeles-Long Beach, CA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0619990Source: Census |
| Place Name: | Duarte city; CaliforniaSource: Census |
We could not locate which school district 91009 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.