Humboldt County administrative offices are located at 825 5th Street, Eureka, CA 95501; phone: 707‑445‑7266.
TOWNS
Humbolt County was formed in 1853 from part of Trinity County. Spanish travelers were recorded as having visited the area as early as 1775. The Bay and County are named for Baron Alexander von Humboldt [1769-1859] a Prussian explorer, geographer and naturalist.