List of state highways in Montana


The state highways in Montana are the state highways owned and maintained by the Montana Department of Transportation in the US state of Montana.
Montana's state highways are classified as either primary or secondary. Several of Montana's state highways, or sections thereof, have also been designated as part of the National Highway System.

Primary state highways

The square markers used today to identify primary Montana highways are only slightly different from their 1940s and earlier predecessors. The old markers used the word "ROUTE" above the number in big size, the route number in the middle, and the word "MONTANA" from edge-to-edge at the sign bottom. The font used was similar to that used for US routes.

Secondary state highways

Montana's secondary system was established in 1942, but secondary highways.
The highway markers for Montana's Secondary Highways are distinctive in that the route number appears in black on a white down-pointing arrowhead.

Former highways