Missoula County Courthouse, Neoclassical courthouse in Downtown Missoula, United States.

The Missoula County Courthouse is a two-story building on an elevated basement, with walls of native sandstone, at 200 West Broadway in downtown Missoula. Missoula architect A.J. Gibson designed it, and the Spokane contractor Williams & Oliver Co. built it in 1908–10 on the site of the previous county courthouse.

The building was constructed between 1908 and 1910 from a design by architect A.J. Gibson, replacing an older courthouse that could no longer meet the growing needs of the county. This new structure reflected the regional expansion and development at the start of the 20th century.

The building displays eight historical murals at its south entrance that depict local history and were created by Edgar S. Paxson. These frescoes tell stories of the region and serve as a visual anchor within the courthouse for visitors.

The building is located at 200 West Broadway in downtown Missoula and is easy to reach as a public government building. Visitors should note that this is an active workplace where formal dress and respectful conduct are expected.

The courthouse stands on the site of the previous county courthouse, which the 1908-10 building replaced. Its walls are cut from native sandstone, and the Spokane firm Williams & Oliver Co. carried out the construction from A.J. Gibson's design. The building joined the National Register of Historic Places on September 1, 1976.