| City: | Mill Valley, California |
| County: | Marin County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 11:05:50 PM |
| Population: | No Population Data |
| Area Codes: | 415 / 628 |
| Classification: | PO Box |
| Coordinates: | 37.9062, -122.5439 |
| Quick Link: |
ZIP code 94942 serves a specific area within Mill Valley, California, located in Marin County. This ZIP is classified for PO Box delivery, but it also maintains limited street delivery to a single location on E Blithedale Avenue. The post office at this location handles 758 PO Boxes and provides business delivery to 313 commercial addresses.
This isn't a residential ZIP in the traditional sense. Census data shows zero population within the ZIP's boundaries, which consist of a single point location rather than a geographic territory. The ZIP is enclosed within the larger Mill Valley ZIP code 94941, which handles residential street delivery for the area. Mill Valley residents can access both PO Box services through 94942 and standard street delivery through neighboring ZIPs.
The single street in this ZIP, E Blithedale Avenue, contains 115 ZIP+4 records with unit designators, suggesting a commercial building or multi-tenant facility. With 15 business establishments employing 46 people, this location serves as a small commercial hub within the broader Mill Valley community. The availability of 758 PO Boxes indicates strong demand for mail services that exceed what the small physical footprint would suggest, likely serving individuals and businesses throughout the Mill Valley area who prefer PO Box delivery.
For PO Box delivery, use:
PO Box [number]
Mill Valley, CA 94942For the street address location on E Blithedale Avenue, use:
[Number] E Blithedale Ave Unit [X]
Mill Valley, CA 94942Most Mill Valley residents receive street delivery through ZIP code 94941.
Single street location with unit designators suggests a commercial building or multi-tenant facility.
ZIP Code 94942 supports both business and residential activity. According to the Business Census (2024), there are 13 business establishments, employing about 49 people with an annual payroll of $3,033,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 2,009Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 13Source: CBP |
| 1st Quarter Payroll: | $658,000Source: CBP |
| Annual Payroll: | $3,033,000Source: CBP |
| # of Employees: | 49Source: CBP |
ZIP Code 94942 is located in Marin County, California, within the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area (CBSA 41860) and California's 2nd Congressional District. This Metro area has a population of 4,653,593 people, about 0.00% of whom live in ZIP Code 94942, and is subdivided into the San Rafael, 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: | San Rafael, CA (CBSA Div 42034)Source: Census |
| CBSA Population: | 4,653,593Source: Census |
| MSA: | San Francisco-Oakland-San Jose, CA CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 12952.23 sq miSource: Census |
| PMSA: | San Francisco, CA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0647710Source: Census |
| Place Name: | Mill Valley city; CaliforniaSource: Census |
We could not locate which school district 94942 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.