Sulphur is a city located in Oklahoma. With a 2020 population of 4,946, it is the 75th largest city in Oklahoma and the 4779th largest city in the United States. Sulphur is currently declining at a rate of -0.72% annually but its population has increased by 0.34% since the most recent census, which recorded a population of 4,929 in 2010. Sulphur reached it's highest population of 5,516 in 1980. Spanning over 7 miles, Sulphur has a population density of 721 people per square mile.
The average household income in Sulphur is $67,588 with a poverty rate of 16.98%. The median rental costs in recent years comes to $681 per month, and the median house value is $106,700. The median age in Sulphur is 36.9 years, 34.2 years for males, and 43 years for females. For every 100 females there are 91.3 males.