Bay St. Louis is a city in Hancock County, Mississippi, home to about 10,188 people across 15 square miles. Its ZIP code is 39520, and parts of 39556 are in Bay St. Louis too.
Homes sold for a median of $230 per square foot in the three months ending August 2026, a balanced market.
Mostly Bay St. Louis; also Waveland
Mostly Kiln; part is in Bay St. Louis
Each card is that ZIP code’s whole market, including any part outside Bay St. Louis. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Bay St. Louis’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Louis Armstrong New Orleans International Airport (MSY)52 miles away |
|---|---|
| Closer regional airport | Gulfport Biloxi International Airport (GPT)24 miles away |
| Nearest city of 250,000+ | New Orleans, LA33 miles away |
| Nearest city of 1 million+ | Houston, TX356 miles away |
Straight-line distances from the center of Bay St. Louis; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Bay St. Louis had 9,284 residents in the 2020 census, up 13% since 2000.
It’s the 42nd largest of 420 towns in Mississippi by population.
Hancock County grew from 11,886 residents in 1900 to 46,053 in 2020.
Hancock County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 89°F in summer, and winter lows average 42°F. About 65 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Waveland, MS weather station (5 miles away).
8,827 jobs at 850 businesses in Hancock County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
93 doctors and other health care providers list an office in Bay St. Louis.
Nearest hospitals
Providers with an office here
| Primary care doctors | 19 |
|---|---|
| Specialist doctors | 6 |
| Dentists | 5 |
| Nurse practitioners and physician assistants | 30 |
| Mental health providers | 22 |
| Physical and occupational therapists | 4 |
| Optometrists | 2 |
| Chiropractors | 5 |
| Pharmacies | 7 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Pharmacies
Libraries
Museums
Counts are within about 2.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Hancock School District, Bay Waveland School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| South Hancock Elementary SchoolBay St. Louis | Pre-K–5 | 480 | Public | 2.4 mi |
| North Bay ElementaryBay St Louis | 3–6 | 348 | Public | 6.9 mi |
| Bay Waveland Middle SchoolBay St. Louis | 6–8 | 365 | Public | 6.9 mi |
| Bay High SchoolBay St Louis | 9–12 | 491 | Public | 6.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Holy Trinity Catholic SchoolBay St Louis | Pre-K–6 | 222 | Roman Catholic | 7.9 mi |
| St StanislausBay St Louis | 7–12 | 329 | Roman Catholic | 7.9 mi |
| Dominion Christian Academy, Inc.Bay St Louis | 9–12 | 9 | Christian (no specific denomination) | 6.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Kiln and Waveland.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.