Mullan is a city located in a sheltered canyon of the Coeur d'Alene Mountains in Shoshone County in the northern part of the U.S. state of Idaho. The population was 840 at the 2000 census. The city is in the east end of the Silver Valley mining district; the elevation is 3250 feet (990 m) above sea level. The Lucky Friday mine is several hundred yards east of the city center The active mine (silver, lead, & zinc) descends more than 6000 feet (1.8 km) below the surface.
Interstate 90 runs by the south side of the city, and the Montana border at Lookout Pass is 4 miles (7 km) east at 4700 feet (1432 m).
Mullan came into existence in 1884 when with the discovery of gold at the Gold Hunter Mine which turned out to be a lead and silver producer. That same year George Good made a lead-silver strike with the morning mine and Mullan came into existence between the two mines. The site was filed in August 1888, after the village had twenty log and fifteen frame houses, a sawmill, and a population of 150. The Northern Pacific Railway came to it in 1889 and the city was incorporated in 1904.