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Clark County is a county located in the U.S. state of Nevada. In 2007, the county had a population of an estimated population of 1,836,333. Las Vegas is the county seat.
Created on February 5, 1908. The county was named for William Andrews Clark, a Montana copper magnate and United States Senator. Clark was largely responsible for the construction of the Los Angeles and Salt Lake Railroad through the area, a factor heavily contributing to the region's early development.