Sulphur is a city located in Calcasieu Parish Louisiana. With a 2020 population of 20,021, it is the 16th largest city in Louisiana and the 1854th largest city in the United States . Sulphur is currently declining at a rate of -0.11% annually and its population has decreased by -1.91% since the most recent census, which recorded a population of 20,410 in 2010. Sulphur reached it's highest population of in . Spanning over 11 miles, Sulphur has a population density of 1,784 people per square mile.
The average household income in Sulphur is $65,319 with a poverty rate of 14.14%. The median rental costs in recent years comes to $850 per month, and the median house value is $141,700. The median age in Sulphur is 36.7 years, 35.1 years for males, and 37.9 years for females.