1860 Census
Fergason     C               30  Male    In     CA      Siskiyou Scott Rvr Twp
Furgason     A               22  Male    Norw   CA      Siskiyou Scott Valley Twp
1900 Census
Ferguson        Clarence E       27  Male    Ks      CA      Siskiyou Butte Twp
Furguson        Thomas           61  Male    Pa      CA      Siskiyou Callahan Twp
Ferguson        Charles N        32  Male    In      CA      Siskiyou Edgewood Twp
Ferguson        Emma             27  Female  Mo      CA      Siskiyou Mott Twp
Ferguson        J C              37  Male    Scot    CA      Siskiyou Mott Twp
1910 Census
Ferguson        Charles N        41  Male    Oh      CA      Siskiyou Callahan Twp
Ferguson        Ross J           37  Male    Ks      CA      Siskiyou Lake Twp
Ferguson        William          20  Male    Or      CA      Siskiyou Squaw Valley Twp
1920 Census
Ferguson        Charles N        51  Male    Oh      CA      Siskiyou Callahan
Ferguson        Arthur           36  Male    Ar      CA      Siskiyou Dunsmuir; Mott