Omaha is the largest city in the state of Nebraska, United States, and is the county seat of Douglas County. It is located in the Midwestern United States on the Missouri River, about 10 miles north of the mouth of the Platte River. According to the 2010 census, Omaha's population was 408,958. As of the census of 1000, there were 390,007 people residing within city limits. Omaha has hot, humid summers and cold, relatively dry winters. Tourist attractions in Omaha include history, sports, outdoors and cultural experiences. Its principal tourist attractions are the Henry Doorly Zoo and the College World Series. The Old Market in Downtown Omaha is another major attraction and is important to the city's retail economy. The city's historical and cultural attractions have been lauded by numerous national newspapers.