Henderson is a city in Clark County, Nevada. The city is part of the Las Vegas metropolitan area, which spans the entire Las Vegas Valley. It is the second largest city in Nevada, after Las Vegas, with an estimated population of 257,729. It occupies the southeast end of the valley, at an elevation of approximately 1,330 feet.
The township of Henderson first emerged in the 1940s during World War II with the building of the Basic Magnesium Plant. Henderson quickly became a main supplier of magnesium in the United States. The plant supplied the US War Department with magnesium for incendiary munition casings and airplane engines, frames, and other parts.