List of Montana numbered highways
| Montana Highway System | |
|---|---|
 
Highway markers for MT 200, and S-323
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Map of main highways (Interstate and U.S.)
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| System information | |
| Maintained by MDT | |
| Highway names | |
| Interstates: | Interstate n (I-n) |
| US Highways: | U.S. Highway n (US n) |
| State: | Montana Highway n (MT n) |
| Secondary: | Secondary Highway n (S-n) |
| System links | |
The state highways in Montana are the state highways owned and maintained by the Montana Department of Transportation (MDT) in the U.S. state of Montana.
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