Eureka is the county seat and principal city in Humboldt County, California, United States. Located adjacent to Humboldt Bay 270 miles north of San Francisco, the port city of 26,097 (2007) residents is situated near extensive preserves of the world's tallest trees - the Coast Redwoods. The city, a major player in the historic west coast lumber trade, is the site of hundreds of Victorian homes, including the Carson Mansion. This architecturally and historically significant coastal city serves as the regional center for government, health care, trade, and the arts for the far North Coast of California.