Sulphur
- Country: United States
- State: Oklahoma
- Population: 5,081 (2016)
- Latitude: 34° 30.5' N (34.50787°)
- Longitude: 96° 58.1' W (-96.96835°)
- Elevation: 305 m/1,000 ft. above sea level
- Time zone: America/Chicago (UTC -06:00); DST observed (UTC -05:00)