Clark County is the southernmost and most populous county in the U.S. state of Nevada, with 2,265,461 residents as of the 2020 census. The county is the location of the state's three largest cities, Las Vegas, Henderson, and North Las Vegas, as well as the Las Vegas Strip, Nellis Air Force Base, and Hoover Dam. Clark County has 8,061 square miles (20,880 km²) of land area, roughly the size of New Jersey.