Host City Atlanta is the capital and most populous city in the state of Georgia as well as the urban core of one of the fastest growing regions in the United States. With a population of 519,145, Atlanta is only the thirty-third largest city in the United States, but the 28-county Atlanta Metropolitan Area is the 8th largest region in the United States, with more than 5,376,285 residents. The Atlanta Combined Statistical Area, an area home to 5,729,304 people, is the most populous in the Southeastern United States, and the city is considered the central metropolis and the unofficial capital of the region. Internationally known as a top business city and transportation hub, Atlanta is—along with its American counterparts Los Angeles, San Francisco, and Washington D.C.—a top tier Beta world city. Containing the world headquarters of businesses such as The Coca-Cola Company, AT&T Mobility, Delta Air Lines, Home Depot, and UPS, Atlanta has the nation's third largest concentration of Fortune 500 companies, and more than 75% of the Fortune 1000 companies have a presence in the Atlanta metropolitan area. Hartsfield-Jackson Atlanta International Airport, which is located seven miles south of downtown Atlanta, is the busiest airport in the world. Atlanta is county seat of Fulton County, although a small portion of the city limits extends into DeKalb County. Residents of the city are known as Atlantans. For things to do in Atlanta please refer to http://www.atlanta.net/