Lincoln County is a county located in the U.S. state of Nevada. At the 2010 census, the population was 5,345, an increase since the 2000 census, when the population was 4,165. Its county seat is Pioche.
Lincoln County was established in 1866 after Nevada moved its state line eastward and southward at the expense of Utah and Arizona territories. It is named after Abraham Lincoln, the 16th President of the United States. Original legislation called for the creation of a "Stewart County", after Nevada Senator William M. Stewart, but this was later changed in a substitute bill. Crystal Springs was the county's first seat in 1866, followed by Hiko in 1867, and Pioche in 1871.
Lincoln County initially included the town of Las Vegas. However, Clark County, Nevada, including Las Vegas, was separated from Lincoln County effective July 1, 1908, by act of the Nevada Legislature.
Area 51 is in Lincoln County, and the county sheriff acts in proxy for the perimeter security forces.