Summerlin is an affluent master-planned community in the Las Vegas Valley of Nevada. It lies at the edge of the Spring Mountains and Red Rock Canyon, on the western periphery of Las Vegas, Nevada in unincorporated Clark County. The community occupies 22,500 acres and includes a variety of land uses, including: residential, commercial, recreational, educational, medical, open space, and cultural. At the 2010 census, Summerlin's population was nearly 100,000, having risen from 59,000 in 2000.
With an average annual household income of $139,061, Summerlin is among the most affluent communities in Nevada. In 2014, Summerlin was named one of the "Best Places to Live in America" by Money.
Summerlin was named after Jean Amelia Summerlin, the wife of Howard R. Hughes Sr. The name "Summerlin" is often used to refer to the adjacent community of Summerlin South as well.