Wyoming Highway 391 (WYO 391) is a short .30-mile-long (0.48 km), albeit signed, Wyoming State Road for the Wyoming Department of Transportation (WYDOT) Maintenance Shop for the Jackson Area.

Wyoming Highway 391 travels from US 26/US 89/US 189/US 191 west to the Jackson Area WYDOT Maintenance Shop where it ends.

[2] The roadway continues past the maintenance shop as Evans Road.

[3] The entire route is in Jackson, Teton County.