| City: | Piedmont, California |
| City Alias: | Oakland |
| County: | Alameda County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:53:25 AM |
| Population: | No Population Data |
| Area Codes: | 341 / 415 / 510 / 628 / 925 |
| Classification: | PO Box |
| Coordinates: | 37.8046, -122.2699 |
| Quick Link: |
ZIP 94620 serves as the PO Box facility for Piedmont, California, a small incorporated city surrounded by Oakland in Alameda County. The post office maintains 206 PO Boxes for residents and businesses in the Piedmont Avenue neighborhood and surrounding areas. While this ZIP contains only PO Box addresses, physical street delivery for the area is handled through neighboring Oakland ZIP codes, particularly 94611.
The facility serves 69 businesses alongside residential customers. Street delivery in the broader service area centers on 41st Street, which connects to the main thoroughfares of Oakland and Piedmont. The post office functions as a supplementary service point rather than the sole delivery option, with most residents receiving mail via Oakland carrier routes while maintaining PO Boxes for business use, mail forwarding, or personal preference.
The street records reference 41st Street, part of Oakland's numbered street grid that runs through the broader East Bay area connecting Piedmont to surrounding neighborhoods.
ZIP Code 94620 supports both business and residential activity. According to the Business Census (2024), there are 4 business establishments, employing about 40 people with an annual payroll of $3,888,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 527Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 4Source: CBP |
| 1st Quarter Payroll: | $900,000Source: CBP |
| Annual Payroll: | $3,888,000Source: CBP |
| # of Employees: | 40Source: CBP |
ZIP Code 94620 is located in Alameda County, California, within the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area (CBSA 41860) and California's 12nd and 13rd Congressional Districts. This Metro area has a population of 4,335,391 people, about 0.00% of whom live in ZIP Code 94620, and is subdivided into the Oakland-Fremont-Berkeley, CA division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | San Francisco-Oakland-Fremont, CASource: Census |
| CBSA Number: | 41860Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Oakland-Fremont-Berkeley, CA (CBSA Div 36084)Source: Census |
| CBSA Population: | 4,335,391Source: Census |
| MSA: | San Francisco-Oakland-San Jose, CA CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 12,13Source: USPS |
| Congressional Land Area: | 38.97, 96.79 sq miSource: Census |
| PMSA: | Oakland, CA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0656938Source: Census |
| Place Name: | Piedmont city; CaliforniaSource: Census |
We could not locate which school district 94620 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.