Sulphur is a city in Calcasieu Parish, Louisiana, home to about 20,775 people across 11 square miles. Its ZIP code is 70663, and parts of 70665 are in Sulphur too.
Homes sold for a median of $115 per square foot in the three months ending August 2026, a seller’s market.
Mostly Sulphur
Mostly Carlyss; part is in Sulphur
Each card is that ZIP code’s whole market, including any part outside Sulphur. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Sulphur’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Sulphur well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | George Bush Intercontinental Airport (IAH)119 miles away |
|---|---|
| Closer regional airport | Lake Charles Regional Airport (LCH)11 miles away |
| Nearest city of 250,000+ | Houston, TX124 miles away |
Straight-line distances from the center of Sulphur; 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.
Sulphur had 21,809 residents in the 2020 census, up 6% since 2000.
It’s the 24th largest of 487 towns in Louisiana by population.
Calcasieu Parish grew from 30,428 residents in 1900 to 216,785 in 2020.
Calcasieu Parish, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 93°F in summer, and winter lows average 43°F. About 59.8 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Lake Charles, LA weather station (11 miles away).
75,412 jobs at 4,705 businesses in Calcasieu Parish. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
145 doctors and other health care providers list an office in Sulphur.
Nearest hospitals
Providers with an office here
| Primary care doctors | 26 |
|---|---|
| Specialist doctors | 15 |
| Dentists | 15 |
| Nurse practitioners and physician assistants | 39 |
| Mental health providers | 25 |
| Physical and occupational therapists | 12 |
| Optometrists | 3 |
| Chiropractors | 10 |
| Pharmacies | 14 |
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.
Parks (6 nearby)
Grocery stores (6 nearby)
Pharmacies (4 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Theaters and performance venues (1 nearby)
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 Calcasieu Parish. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Cypress Cove Elementary SchoolSulphur | Pre-K–5 | 399 | Public | 1.6 mi |
| E. K. Key Elementary SchoolSulphur | Pre-K–5 | 546 | Public | 1.8 mi |
| Frasch Elementary SchoolSulphur | Pre-K–5 | 522 | Public | 1.1 mi |
| Jake Drost School for Exceptional ChildrenSulphur | Pre-K–12 | 19 | Special Education | 2.3 mi |
| Maplewood ElementarySulphur | Pre-K–5 | 640 | Public | 3.4 mi |
| Richard W. Vincent Elementary SchoolSulphur | Pre-K–5 | 283 | Public | 1.1 mi |
| Vincent Settlement Elementary SchoolSulphur | Pre-K–5 | 284 | Public | 4.8 mi |
| W. T. Henning Elementary SchoolSulphur | Pre-K–5 | 369 | Public | 0.2 mi |
| LeBlanc Middle SchoolSulphur | 6–8 | 366 | Public | 2.3 mi |
| Maplewood Middle SchoolSulphur | 6–8 | 319 | Public | 3.4 mi |
| W. W. Lewis Middle SchoolSulphur | 6–8 | 757 | Public | 1.3 mi |
| Sulphur High SchoolSulphur | 9–12 | 1,911 | Public | 1.2 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Little Learners MontessoriSulphur | Pre-K–K | 6 | Nonsectarian | 3.3 mi |
| Our Lady's SchoolSulphur | Pre-K–8 | 205 | Roman Catholic | 1.1 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 Carlyss.
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.