Santa Ana is the county seat and second most populous city in Orange County, California, and with a population of 324,528 at the 2010 census, Santa Ana is the 57th-most populous city in the United States. Founded in 1869, Santa Ana is located in Southern California adjacent to the Santa Ana River, 10 miles (16 km) away from the California coast. The city is part of the Los Angeles/Long Beach/Santa Ana metropolitan area which, according to the U.S. Census Bureau, is the second largest metropolitan area in the U.S., with almost thirteen million people. According to the 2000 U.S. Census, of U.S. cities with more than 300,000 people, Santa Ana is the 4th-most densely populated behind only New York City, San Francisco, and Chicago, and slightly denser than Boston. Santa Ana lends its name to the Santa Ana Freeway (I-5), which runs through the city.
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