| City: | Sierra Madre, California |
| County: | Los Angeles County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 10:01:46 PM |
| Population: | No Population Data |
| Area Code: | 626 |
| Classification: | PO Box |
| Coordinates: | 34.1618, -118.0518 |
| Quick Link: |
Sierra Madre sits at the base of the San Gabriel Mountains in Los Angeles County. ZIP code 91025 handles PO Box service for this small foothill community while its sibling ZIP 91024 covers street delivery. The post office at 61 S Baldwin Avenue maintains 550 PO Boxes and serves 211 businesses.
This arrangement is typical for older California communities where the post office predates modern carrier routes. Sierra Madre residents who want a PO Box use 91025. Those receiving mail at home use 91024. The city's population of roughly 11,000 falls entirely within the 91024 boundaries, which explains why 91025 shows zero population in Census data.
Sierra Madre is known for its small-town character within greater Los Angeles. The post office sits on Baldwin Avenue, the main commercial street running through the village center. Nearby communities include Arcadia (0.3 miles away), Pasadena's Northeast neighborhood (0.9 miles), and East Pasadena (1.1 miles). Despite its proximity to these larger cities, Sierra Madre maintains a distinct identity as a quiet foothill town.
All mail service operates from the post office on S Baldwin Avenue, Sierra Madre's main commercial street.
ZIP Code 91025 supports both business and residential activity. According to the Business Census (2024), there are 3 business establishments, employing about 5 people with an annual payroll of $195,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 817Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 3Source: CBP |
| 1st Quarter Payroll: | $47,000Source: CBP |
| Annual Payroll: | $195,000Source: CBP |
| # of Employees: | 5Source: CBP |
ZIP Code 91025 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 13,012,469 people, about 0.00% of whom live in ZIP Code 91025, 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: | 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: | 0671806Source: Census |
| Place Name: | Sierra Madre city; CaliforniaSource: Census |
We could not locate which school district 91025 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.