Rock Springs is a city in Sweetwater County, Wyoming, United States.
The population was 23,036 at the 2010 census. Rock Springs is the principal
city of the Rock Springs micropolitan statistical area, which has a population
of 37,975. Rock Springs is known as the Home of 56 Nationalities because of the
influx of immigrants from all over the world who came to work in the coal mines
that supplied the fuel to power the steam engines of the Union Pacific
Railroad. The city's rich cultural heritage is celebrated each summer on
International Day, a festival where the foods, costumes, and traditions of