Wyoming Highway 73 is an east-west state highway in northwestern Carbon County, Wyoming that travels west into extreme northeastern Sweetwater County. Highway 73 provides access the town of Bairoil.

Wyoming Highway 73 begins its west end at the city limits for Bairoil, in Sweetwater County, just east of an intersection with Bairoil Dr. From there Highway 73 travels east into Carbon County and at 4.64 miles WYO 73 ends at US 287/WYO 789 in Lamont.