Anaheim is a city in Orange County, California. As of the 2010 United States Census, the city population was about 365,463, making it the most populated city in Orange County, the 10th most-populated city in California, and ranked 54th in the United States. The city anticipates that the population will surpass 400,000 by 2014 because of rapid development in its Platinum Triangle area as well as in Anaheim Hills. The Platinum Triangle is the fastest growing area in Orange County. Anaheim is the second largest city in Orange County in terms of land area (after Irvine), and is known for its theme parks, sports teams and convention center.