Premise: Superior is a town in and the county seat of Mineral County, Montana, United States. The population was 812 at the 2010 census. Superior was named after its founders' hometown of Superior, Wisconsin in 1869. The post office was established in 1871 after Mineral County became the site of one of the largest gold strikes that helped settle the West.
Hypothesis: The Superior, Montana post office was established after the gold strike in Mineral County.