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.