White Sulphur Springs is a city located in Meagher County, Montana. White Sulphur Springs has a 2026 population of 1,021. It is also the county seat of Meagher County. White Sulphur Springs is currently growing at a rate of 0.49% annually and its population has increased by 7.36% since the most recent census, which recorded a population of 951 in 2020.