Vandalia is a small unincorporated community in Valley County, Montana, United States. It was established in 1904 with a post office and a store along the Hi-Line of the Great Northern Railway. The community's chief industry was the manufacture of bricks that were used in public buildings across Montana. Vandalia also shares its namesake with a local dam on the Milk River that diverts water for the Glasgow Irrigation District.
According to the Köppen Climate Classification system, Vandalia has a semi-arid climate, abbreviated "BSk" on climate maps.
AmtrakâÂÂs Empire Builder, which operates between Seattle/Portland and Chicago, passes through the small town on BNSF tracks, but makes no stop. The nearest station is located in Glasgow, to the southeast.