Anaheim is a city in northern Orange County, California, United States, part of the Greater Los Angeles area. As of the 2020 census, the city had a population of 346,824, making it the most populous city in Orange County, the tenth-most populous city in California, and the 55th-most populous city in the United States. The second largest city in Orange County in terms of land area, Anaheim is known for being the home of the Disneyland Resort, the Anaheim Convention Center, and two major league sports teams: the Los Angeles Angels of Major League Baseball (MLB) and the Anaheim Ducks of the National Hockey League (NHL).

Orange County is a county located in the Los Angeles metropolitan area in Southern California, United States. As of the 2020 census, the population was 3,186,989, making it the third-most-populous county in California, the sixth-most-populous in the United States, and more populous than 19 American states and Washington, D.C. Although largely suburban, it is the second-most-densely-populated county in the state behind San Francisco County. The county's three most-populous cities are Anaheim, Santa Ana, and Irvine, each of which has a population exceeding 300,000. Santa Ana is also the county seat. Six cities in Orange County are on the Pacific coast: Seal Beach, Huntington Beach, Newport Beach, Laguna Beach, Dana Point, and San Clemente.