Eureka is the county seat and principal city in Humboldt County, California, United States. Located adjacent to Humboldt Bay, the city is situated between extensive preserves of the world's tallest trees - the Coast Redwoods. This architecturally and historically significant seaport serves as the regional center for government, health care, trade, and the Arts for the far North Coast of California. Eureka apartments for rent comparison page shows most up to date rent information on Eureka apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.