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Clark County is a county located in southern Nevada. As of the 2010 census, the population was 1,951,269, with an estimated population of 2,000,759 in 2012.〔(【引用サイトリンク】url=http://quickfacts.census.gov/qfd/states/32/32003.html )〕 It is by far the most populous county in the state of Nevada, accounting for nearly three-quarters of its residents. Las Vegas, Nevada's most populous city, has been the county seat since the county was established. The county was formed by the Nevada Legislature by splitting off a portion of Lincoln County on February 5, 1909,〔(Las Vegas Sun, January 4, 2009 ); Joseph Nathan Kane, ''The American Counties'' (4th Ed.), (The Scarecrow Press, 1983), p479-480〕 and came into existence on July 1, 1909. The Las Vegas Valley, a basin, includes Las Vegas as well as the other primary population center, the unincorporated community of Paradise. Much of the county was originally part of Pah-Ute County, Arizona Territory before Nevada became a state. The county was named for William Andrews Clark, a Montana copper magnate and U.S. 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. Clark County is today known as a major tourist destination, with 150,000 hotel rooms. The Las Vegas Strip, home to most of the hotel-casinos known to many around the world, is located not within the City of Las Vegas city limits, but in unincorporated Paradise. It is, however, located in the Las Vegas Valley. Clark County is coextensive with the Las Vegas–Paradise, NV Metropolitan Statistical Area, a metropolitan statistical area designated by the Office of Management and Budget and used by the United States Census Bureau and other agencies for statistical purposes. ==Geography== According to the U.S. Census Bureau, the county has a total area of , of which is land and (2.1%) is water. The Colorado River forms the county's southeastern boundary, with Hoover Dam forming Lake Mead along much of its length. The lowest point in the state of Nevada is located on the Colorado River just south of Laughlin in Clark County, where it flows out of Nevada and into California and Arizona. Las Vegas is a ''valley.'' By definition, Greater Las Vegas is a tectonic valley, surrounded by four mountain ranges, with nearby Mount Charleston being the highest elevation at , located to the northwest. Other than the forests on Mount Charleston, the geography in Clark County is a desert. Creosote bushes are the main native vegetation, and the mountains are mostly rocky with little vegetation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Clark County, Nevada」の詳細全文を読む スポンサード リンク
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