Rock Springs is a city in Sweetwater County, Wyoming, United States. The population was 23,036 at the 2010 census, making it the 5th most populated city in the state of Wyoming, and the most populous city in Sweetwater County.
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Wyoming is a landlocked state in the western United States. The 10th largest state by area, it is also the least populous and least densely populated state in the contiguous United States.
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The U.S. is a country of 50 states covering a vast swath of North America, with Alaska in the northwest and Hawaii extending the nation?s presence into the Pacific Ocean. Major Atlantic Coast cities are New York, a global finance and culture center, and capital Washington, DC. Midwestern metropolis Chicago is known for influential architecture and on the west coast, Los Angeles' Hollywood is famed for filmmaking.

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