Came to Humboldt Co. 16 June 1850 on the schooner Rainbow. Was mayor of Eureka in 1878.
Indian Wars: Field & Staff, 4th U.S. Infantry
Civil War: Field & Staff, 1st Battalion, California Mountaineers
Dr. Jonathan Clark, Jr., was the son of Jonathan Clark, Sr. (1776-1849) and Catherine Jonas (1782-1854). He arrived in California in 1849 and in Humboldt County aboard the schooner "Rainbow" June 16, 1850. He was appointed the region's first postmaster in 1851. Dr. Clark was appointed Acting Assistant Surgeon, U.S. Army, November 1, 1853, and assigned to Field & Staff, 4th U.S. Infantry, with duty at Fort Humboldt. Jonathan married Maria Ryan at Eureka in November 1855. He enlisted as a surgeon (1st lieutenant) at Fort Humboldt, California, June 4, 1863, and was commissioned into Field & Staff, 1st Battalion, California Mountaineers, June 25. Dr. Clark was mustered out at Fort Humboldt June 14, 1865. After the war he returned to Eureka where he served on the city council and was elected mayor in 1878. Dr. Clark died at the Grand Hotel in San Francisco while on a visit to that city. His remains were returned to his home in Eureka for burial.
CLARK. In this city, March 29, at the Grand Hotel, Dr. Jonathan Clark of Eureka, Humboldt County, Cal., age 58 years.
(San Francisco Call, March 31, 1884; 4:4)