California Bound transcribed passenger lists for ships and wagon trains traveling to California between 1848 and 1873
California Digital Newspaper Collection has over 200,000 newspaper pages from 1849 to 1911
Claremont Colleges Libraries Special Collections San Gabriel Mission matrimonial investigation records, Wheeler scrapbooks
City of Mountain View Public Library obituary index, some before 1967
Contra Costa County Genealogical Society vital records index from the Contra Costa Gazette, voters lists and more
California Newspaper Project (CNP) comprehensive source of information about California’s newspapers
Online Archive of California compilation of images, documents, letters, oral histories and collection guides from California museums, historical societies and archives
Palo Alto City Library Palo Alto Historical Association Obituary Index, earliest in 1890s
Santa Cruz Public Libraries local news index 1846-1949, newspaper clippings index, photo collection
Spanish Archive Records Ancestry’s collection of Spanish Archive Records, 1784-1868, before Calfornia came under U.S. rule $
State Lands Commission Shipwrecks, articles and stories about various California shipwrecks and California maritime history
Ventura County Genealogical Society Archive Cemetery, Census, Court, Death, Immigration,Land, Marriage, Military, Miscellaneous, Obituary, Probate and Voter Records Online

Also see links for Western States