| City: | Bay Saint Louis, Mississippi |
| City Alias: | Bay St Louis |
| County: | Hancock County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 8:16:10 PM |
| Population: | No Population Data |
| Area Code: | 228 |
| Classification: | PO Box |
| Coordinates: | 30.3088, -89.3301 |
| Quick Link: |
The facility functions as a customer service point for those who prefer or require PO Box service. Some customers choose boxes for mail security or business purposes, while the post office location provides a central pickup point. The setup is common in coastal Mississippi communities where a single city may have both a street delivery ZIP and a dedicated PO Box facility.
This ZIP code contains only PO Box delivery points with no street-level mail routes.
ZIP Code 39521 supports both business and residential activity. According to the Business Census (2024), there are 9 business establishments, employing about 29 people with an annual payroll of $1,362,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 1,049Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 9Source: CBP |
| 1st Quarter Payroll: | $381,000Source: CBP |
| Annual Payroll: | $1,362,000Source: CBP |
| # of Employees: | 29Source: CBP |
ZIP Code 39521 is located in Hancock County, Mississippi, within the Gulfport-Biloxi, MS Metropolitan Statistical Area (CBSA 25060) and Mississippi's 4th Congressional District. This Metro area has a population of 248,820 people, about 0.00% of whom live in ZIP Code 39521. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Gulfport-Biloxi, MSSource: Census |
| CBSA Number: | 25060Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 248,820Source: Census |
| MSA: | Biloxi-Gulfport-Pascagoula, MS MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 04Source: USPS |
| Congressional Land Area: | 8044.48 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2803980Source: Census |
| Place Name: | Bay St. Louis city; MississippiSource: Census |
We could not locate which school district 39521 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.