Filed Under Philipsburg

Granite County Jail

The Granite County Jail was constructed in 1896, three years after Granite County was carved from two adjacent counties and Philipsburg made the county seat. The town served as hub to extensive area mining and, later, ranching. The jail was the first major public building constructed for county use, reflecting early desire for law and order. This stately building contains jail space, the sheriff’s office, and the sheriff’s residence. It was constructed for an estimated $8,000 using features from several architectural styles. The jail’s dominant feature is a medieval tower above the arched portico. Its bricked-over windows, intriguingly, were part of the original creation. The dark brick was locally fired and the rough-cut granite locally quarried. Renovated successfully to current standards, this remains one of Montana’s oldest jails still serving its original function.


Granite County Jail Granite County Jail, facing north on East Kearney Street, front view of building. Source: Creator: Date: Dec. 2008
Granite County Jail Granite County Jail. Facing north to northeast on East Kearney Street, front view of building. B&W. Source: Montana State Historic Preservation Office from the Photograph Archives at the Montana Historical Society Creator: Photographer unidentified Date: 1980-1984


220 North Sansome Street, Philipsburg, Montana | Public


The Montana National Register Sign Program, “Granite County Jail,” Historic Montana, accessed December 11, 2023,