| City: | San Luis Obispo, California |
| City Alias: | Sn Luis Obisp |
| County: | San Luis Obispo County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 10:39:33 PM |
| Population: | No Population Data |
| Area Codes: | 805 / 820 |
| Classification: | PO Box |
| Coordinates: | 35.2828, -120.6587 |
| Quick Link: |
The post office functions as an overflow facility for the surrounding area, which receives standard carrier delivery through ZIP 93405. Businesses and residents who prefer centralized mail pickup or need separate business addresses use these boxes. The high business count relative to residential boxes suggests this facility serves commercial clients who want San Luis Obispo addresses without maintaining physical storefronts in more expensive areas of town.
The single street entry represents the postal facility itself rather than a traditional delivery route, confirming this ZIP's role as a dedicated PO Box service location.
ZIP Code 93403 supports both business and residential activity. According to the Business Census (2024), there are 12 business establishments, employing about 94 people with an annual payroll of $4,908,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 1,536Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 12Source: CBP |
| 1st Quarter Payroll: | $1,287,000Source: CBP |
| Annual Payroll: | $4,908,000Source: CBP |
| # of Employees: | 94Source: CBP |
ZIP Code 93403 is located in San Luis Obispo County, California, within the San Luis Obispo-Paso Robles, CA Metropolitan Statistical Area (CBSA 42020) and California's 24th Congressional District. This Metro area has a population of 281,486 people, about 0.00% of whom live in ZIP Code 93403. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | San Luis Obispo-Paso Robles, CASource: Census |
| CBSA Number: | 42020Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 281,486Source: Census |
| MSA: | San Luis Obispo-Atascadero-Paso Robles, CA MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 24Source: USPS |
| Congressional Land Area: | 6883.35 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0668154Source: Census |
| Place Name: | San Luis Obispo city; CaliforniaSource: Census |
We could not locate which school district 93403 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.