Philipsburg is a town in and the county seat of Granite County, Montana, United States. The population was 820 at the 2010 census. The town was named after the famous mining engineer Philip Deidesheimer, who designed and supervised the construction of the ore smelter around which the town originally formed.
Philipsburg is located at 46°19′59″N 113°17′48″W (46.333108, -113.296564).
According to the United States Census Bureau, the town has a total area of 0.80 square miles (2.07 km2), all land.
As of the census of 2010, there were 820 people, 413 households, and 217 families residing in the town. The population density was 1,025.0 inhabitants per square mile (395.8/km2). There were 547 housing units at an average density of 683.8 per square mile (264.0/km2). The racial makeup of the town was 96.8% White, 0.1% African American, 0.9% Native American, 0.2% Asian, 0.4% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 1.8% of the population.
There were 413 households, of which 16.0% had children under the age of 18 living with them, 40.0% were married couples living together, 8.5% had a female householder with no husband present, 4.1% had a male householder with no wife present, and 47.5% were non-families. 40.0% of all households were made up of individuals, and 17.9% had someone living alone who was 65 years of age or older. The average household size was 1.92 and the average family size was 2.53.