Las Vegas, colloquially referred to as Vegas, is the most populous city in the U.S. state of Nevada and the seat of Clark County. The Las Vegas Valley metropolitan area is the largest within the greater Mojave Desert, and second-largest in the Southwestern United States. Las Vegas is an internationally renowned major resort city, known primarily for its gambling, shopping, fine dining, entertainment, and nightlife, with most venues centered on downtown Las Vegas and more to the Las Vegas Strip just outside city limits. The Las Vegas Valley as a whole serves as the leading financial, commercial, and cultural center for Nevada. According to the United States Census Bureau, the city had 641,903 residents in 2020, with a metropolitan population of 2,227,053, making it the 25th-most populous city in the United States. The city bills itself as the Entertainment Capital of the World, and is famous for its luxurious and extremely large casino-hotels. With over 40.8 million visitors annually as of 2023, Las Vegas is one of the most visited cities in the United States. It is a top-three U.S. destination for business conventions and a global leader in the hospitality industry, claiming more AAA Five Diamond hotels than any other city in the world. Las Vegas annually ranks as one of the world's most visited tourist destinations. The city's tolerance for numerous forms of adult entertainment has earned it the nickname "Sin City", and has made Las Vegas a popular setting for literature, films, television programs, commercials and music videos. Las Vegas was settled in 1905 and officially incorporated in 1911. At the close of the 20th century, it was the most populated North American city founded within that century (a similar distinction was earned by Chicago in the 19th century). Population growth has accelerated since the 1960s and into the 21st century, and between 1990 and 2000 the population nearly doubled, increasing by 85.2%. As with most major metropolitan areas, the name of the primary city ("Las Vegas" in this case) is often used to describe areas beyond official city limits. In the case of Las Vegas, this especially applies to the areas on and near the Strip, which are actually in the unincorporated communities of Paradise and Winchester.