Sulphur is a city located in Louisiana. With a 2020 population of 20,198, it is the 16th largest city in Louisiana and the 1830th largest city in the United States. Sulphur is currently declining at a rate of -0.08% annually and its population has decreased by -1.04% since the most recent census, which recorded a population of 20,410 in 2010. Sulphur reached it's highest population of 20,512 in 2000. Spanning over 11 miles, Sulphur has a population density of 1,800 people per square mile.
The average household income in Sulphur is $63,838 with a poverty rate of 12.36%. The median rental costs in recent years comes to $835 per month, and the median house value is $138,800. The median age in Sulphur is 35.8 years, 33.2 years for males, and 38.4 years for females. For every 100 females there are 94.3 males.