Claim: There are people in Anaheim, California.

Orange County is a county in the U.S. state of California . As of the 2010 census , the population was 3,010,232 making it the third-most populous county in California , the sixth-most populous in the United States , and more populous than twenty-one U.S. states . Its county seat is Santa Ana . It is the second most densely populated county in the state , second only to San Francisco County . The county 's four largest cities , Anaheim , Santa Ana , Irvine , and Huntington Beach each have populations exceeding 200,000 . Several of Orange County 's cities are on the Pacific coast , including Huntington Beach , Newport Beach , Laguna Beach , and San Clemente .   Orange County is included in the Los Angeles-Long Beach-Anaheim , CA Metropolitan Statistical Area . Thirty-four incorporated cities are located in the county ; the newest is Aliso Viejo , which was incorporated in 2001 . Anaheim was the first city , incorporated in 1870 , when the region was still part of neighboring Los Angeles County . Whereas most population centers in the United States tend to be identified by a major city , there is no defined urban center in Orange County . It is mostly suburban except for some traditionally urban areas at the centers of the older cities of Anaheim , Fullerton , Huntington Beach , Orange , and Santa Ana . There are several edge city-style developments such as Irvine Business Center , Newport Center , and South Coast Metro .   The county is famous for its tourism as the home of attractions like Disneyland , Knott 's Berry Farm , and several beaches along its more than 40 mi of coastline . It is also known for its political conservatism -- a 2005 academic study listed three Orange County cities as among America 's 25 most conservative , making it one of two counties in the nation containing more than one such city . -LRB- Maricopa County , Arizona also has three cities on the list . -RRB- It is part of the Tech Coast .