List of United States federal courthouses in Montana
This is a list of current and former courthouses of the United States federal court system located in Montana. Each entry indicates the name of the building along with an image, if available, its location and the jurisdiction it covers, the dates during which it was used for each such jurisdiction, and, if applicable the person for whom it was named, and the date of renaming. Dates of use will not necessarily correspond with the dates of construction or demolition of a building, as pre-existing structures may be adapted or court use, and former court buildings may later be put to other uses. Also, the official name of the building may be changed at some point after its use as a federal court building has been initiated.
Courthouses
| Courthouse | City | Image | Street address | Jurisdiction | Dates of use | Named for |
| U.S. Post Office and Courthouse† | Billings | 2602 1st Avenue North | D.Mont | 1914–? | n/a | |
| Stillwater Building | Billings | 316 North 26th Street | D.Mont | 1963–2012 | n/a | |
| James F. Battin Federal Courthouse | Billings | 2601 2nd Avenue North | D.Mont | 2012–present | U.S. Rep. and District Court judge James Franklin Battin | |
| Mike Mansfield Federal Bldg & U.S. Courthouse† | Butte | 400 North Main Street | D.Mont | 1904–present | U.S. Sen. Mike Mansfield | |
| U.S. Post Office† | Glasgow | 605 2nd Avenue South | D.Mont | 1939–? Still in use as a post office. | n/a | |
| U.S. Post Office and Courthouse† | Great Falls | 215 1st Avenue North | D.Mont | 1912–2009 Still in use as a Post Office | n/a | |
| Missouri River Courthouse | Great Falls | 125 Central Avenue West | D.Mont | 2009–present | Location; adjacent to the Missouri River | |
| U.S. Post Office† | Havre | 306 3rd Avenue | D.Mont | 1932–? | n/a | |
| Federal Building and United States Post Office | Helena | 316 N. Park Avenue | D.Mont | 1904–1970s Renamed City-County Building, still in use by the city and county governments. | n/a | |
| Federal Building | Helena | 301 S. Park Avenue | D.Mont | 1970s–2002 Renamed Park Avenue Building, still in use by the State of Montana. | n/a | |
| Paul G. Hatfield Courthouse | Helena | 901 Front Street | D.Mont | 2002–present | U.S. Senator and District Court judge Paul G. Hatfield | |
| Federal Building, U.S. Post Office and Courthouse† | Missoula | 200 East Broadway | D.Mont | 1929–1974 Constructed in 1913. Still in use by various government agencies | n/a | |
| Russell Smith Courthouse | Missoula | 201 East Broadway | D.Mont | ?–present | U.S. District Court judge Russell Evans Smith |