| City: | Napa, California |
| County: | Napa County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 11:03:18 PM |
| Population: | No Population Data |
| Area Codes: | 369 / 707 |
| Classification: | PO Box |
| Coordinates: | 38.2975, -122.2845 |
| Quick Link: |
This facility doesn't reflect a lack of street delivery in Napa. Rather, it functions as a dedicated PO Box center for residents and businesses who prefer or require post office box service. The surrounding Napa area receives standard carrier route delivery through ZIP code 94559, which geographically encloses this smaller PO Box-only zone. This arrangement is common in mid-sized cities where mail volume justifies a separate facility dedicated to PO Box services.
The single street reference to Randolph Street represents the physical location of the post office facility rather than a traditional delivery area. This is typical for dedicated PO Box centers in urban areas.
ZIP Code 94581 supports both business and residential activity. According to the Business Census (2024), there are 10 business establishments, employing about 122 people with an annual payroll of $9,905,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 1,043Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 10Source: CBP |
| 1st Quarter Payroll: | $2,631,000Source: CBP |
| Annual Payroll: | $9,905,000Source: CBP |
| # of Employees: | 122Source: CBP |
ZIP Code 94581 is located in Napa County, California, within the Napa, CA Metropolitan Statistical Area (CBSA 34900) and California's 4th Congressional District. This Metro area has a population of 136,070 people, about 0.00% of whom live in ZIP Code 94581. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Napa, CASource: Census |
| CBSA Number: | 34900Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 136,070Source: Census |
| MSA: | San Francisco-Oakland-San Jose, CA CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 04Source: USPS |
| Congressional Land Area: | 12836.2 sq miSource: Census |
| PMSA: | Vallejo-Fairfield-Napa, CA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0650258Source: Census |
| Place Name: | Napa city; CaliforniaSource: Census |
We could not locate which school district 94581 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.