Arcata, originally Union Town or Union, is a city adjacent to the Arcata Bay (northern) portion of Humboldt Bay in Humboldt County, California, United States. At the 2010 census, Arcata's population was 17,231. This college town, located north of San Francisco (via Highway 101), is home to Humboldt State University. Arcata is also the location of the Arcata Field Office of the Federal Bureau of Land Management, which is responsible for the administration of natural resources, lands, and mineral programs, including the Headwaters Forest, on approximately 200,000 acres of public land in Northwestern California.