Anaheim () is a city in Orange County, California, part of the Los Angeles metropolitan area. As of the 2010 United States Census, the city had a population of 336,265, making it the most populous city in Orange County and the 10th-most populous city in California. Anaheim is the second-largest city in Orange County in terms of land area, and is known for being the home of the Disneyland Resort, the Anaheim Convention Center, and two major sports teams: the Anaheim Ducks ice hockey club and the Los Angeles Angels baseball team.
Anaheim was founded by fifty German families in 1857 and incorporated as the second city in Los Angeles County on March 18, 1876; Orange County was split off from Los Angeles County in 1889. Anaheim remained largely an agricultural community until Disneyland opened in 1955. This led to the construction of several hotels and motels around the area, and residential districts in Anaheim soon followed. The city also developed into an industrial center, producing electronics, aircraft parts and canned fruit. Anaheim is a charter city.
Anaheim's city limits extend almost the full width of Orange County, from Cypress in the west, twenty miles east to the Riverside County line in the east, encompassing a diverse range of neighborhoods. In the west, mid-20th-century tract houses predominate. Downtown Anaheim has three mixed-use historic districts, the largest of which is the Anaheim Colony.