| History of roads & trails | Humboldt Times | MF 10 | 6/21/1953 | 26 | | History | | History, Roads & Trails 1856 |
| History of Rohnerville Airport | Humboldt Times | MF 10 | 8/7/1949 | 19 | | History | Rohnerville | Rohnerville Airport |
| History of stages operating out of Del Norte County | Humboldt Times | MF 10 | 9/17/1957 | 9 | 3 & 4 & 5 | History | Del Norte County Trinidad Crescent City | Stages Operating, History, Pierce Arrow Stage, First Auto Stage |
| History of Stone Lagoon Schoolhouse by Savina Barlon | Humboldt Times | MF 10 | 7/13/1958 | 1-14 | 1-6 | History | Stone Lagoon Big Lagoon | Stone Lagoon, Dry Lagoon, Hans Hendrickson |
| History of Table Bluff by Andy Genzoli | Humboldt Times | MF 10 | 9/4/1949 | 13 & 16 | | Article & Whole Page | Table Bluff | Table Bluff, Andy Genzoli |
| History of the Calif. Barrel Co. | The Humboldt Times | MF 10 | 10/26/1946 | 12 | half page at bottom | History | Arcata | History, Company |
| History of the college | Humboldt Times | MF 10 | 3/14/1951 | 16 | | History | Arcata | History, College |
| History of the Jetties | Humboldt Times | MF 10 | 11/9/1923 | 7 | 2 | History | Jetties | Jetties, History |
| History of the Morrison Family ranches | Humboldt Times | MF 10 | 8/31/1962 | 17 | | Article | Bear River | Morrison Family Ranches |
| History of the Silva Ranches | Humboldt Times | MF 10 | 6/6/1954 | 11 | | History | Silva Ranches Mad River Bottom Blue Lake | Silva Ranches, Mad River Bottom, Blue Lake |
| History of Travel Club of Humboldt County | The Humboldt Times | MF 10 | 10/12/1958 | 17 | | History | | History, Mrs. Edward Fautz, Travel Club |
| History of Trinity River Diversion Plan | Humboldt Times | MF 10 | 1/14/1953 | 1 | 7 & 8 | History | Trinity River | Trinity River Diversion Plan |
| History of Tyee City | Humboldt Times | MF 10 | 8/12/1951 | 7 | | History | Tyee City | Tyee City |
| History of Vance RR, Hammond Lumber company | Humboldt Times | MF 10 | 5/26/1950 | 18,19 | | History summary | | Vance Rr, Hammond Lumber |
| History of water supply for Eureka | The Humboldt Times | MF 10 | 10/9/1932 | 2 | 1 & 2 | History | Eureka | Water, Ricks Water Company, Mayor Staffed, Supply |
| History of Whaling Station | Humboldt Times | MF 10 | 5/27/1951 | 6 | | Whaling Station | Fields Landing | Whaling Station, Fields Landing |
| History of White House Furniture Store | Humboldt Times | MF 10 | 10/7/1951 | 7 | | History | | White House Furniture Store |
| History on movie theaters in area | Humboldt Times | MF 10 | 4/15/1951 | 6 | 3 | History | Eureka Ukiah Klamath | Movie Theaters, History, Midway Drive-In |
| History on the cannery built in 1877 | | | | | | History File Notes | Cock Robin Island | Cannery Building, Cock Robin Island |
| Holmes - Eureka Lumber Company submitted petition for streets in old town Bucksport officially declared closed | Daily Humboldt Times | MF 10 | 6/16/1909 | 8 | 4 | Legal Notice | Bucksport | Holmes - Eureka Lumber Company, Petition, Title |
| Holmes Eureka Lumber company finish bridge | Humboldt Times | MF 10 | 5/25/1909 | 8 | 1 | New Bridge | Eel River | Holmes Eureka Lumber Company, Bridge, Eel River |
| Holmes Eureka Lumber company sending work to logging | Humboldt Times | MF 10 | 5/9/1909 | 9 | 3 | Logging work | Eureka | Holmes Eureka Lumber Company, Summer Bridge |
| Home of John S. Murray turn down | Humboldt Times | MF 10 | 9/7/1923 | 3 | | Local News | Eureka | House, Demolition, History, Streets, Map |
| Home of S.F. Pine was scene of large gatherings in old days | Humboldt Times | MF 10 | 7/21/1933 | 4 | 2 | House use | Pine Hill | Home, Gatherings, S.F. Pine |
| Homes built in Eureka | Humboldt Times | MF 10 | 5/15/1949 | 24 | | Homes | Eureka | Homes, Eureka |
| Homes in Country Club Estates up Humboldt Hill Road | Humboldt Times | MF 10 | 7/22/1956 | 27 | N/A | Advertisement | Humboldt Hill Eureka | Spiering Homes Incorporated |
| Homes in Westwood Village | Humboldt Times | MF 10 | 7/8/1956 | 20 | N/A | Advertisement | Arcata Westwood Village | Westwood Village, Spiering Homes Incorporated, Veterans |
| Hoopa Drive in Theater | Humboldt Times | MF 10 | 7/21/1956 | 10 | 7 | Theater | Hoopa | Theater, Hoopa |
| Hoopa Valley Indian hospital | Blue Lake Advocate | MF 2191 | 6/24/1916 | 1 | 3 | Hospital | Hoopa Valley | Tom Engelhardt, Hoopa Valley Indian Agency |
| Horance Anderson was awarded the contract to constr. the Indianola cut-off that will connect NR w/ the RW Highway. | Humboldt Times | MF 10 | 3/12/1929 | 4 | 4 | Contract updates | Freshwater | Contract, Deals, Construction |
| Horse drawn street car use in Eureka | Humboldt Times | MF 10 | 10/10/1923 | 9 | 5 | History | Eureka | Street Car, Horse Drawn, Eureka |
| Hospital Age | Humboldt Times | MF 10 | 9/30/1927 | 5 | | Building | | Hospital |
| Hospital destroyed by fire in late 1920s | Humboldt Times | MF 10 | 10/24/1954 | 5 | | Photos | | Fires, Photos, Hospitals |
| Hotel court work started at east end of 4th | Humboldt Times | MF 10 | 1/6/1937 | 3 | 6 | Hotel Court | Eureka | Hotel Court, Eureka , Drawbridge |
| Hotel fire at the Metropolitan | The Humboldt Times | MF 10 | 12/21/1907 | 3 | 1 | Fire | Metropolitan | Hotel Fire, Metropolitan |
| Hotel management in Petrolia | Daily Humboldt Times | MF 10 | 1/1/1878 | 3 | 2 | Hotel management | Petrolia | Petrolia, Mr. Tuttle |
| Hotel Sterling | Humboldt Times | MF 10 | 8/12/1947 | 2 | | Old building | Eureka | Hotel Sterling, Torn Down |
| Hotels at Scottsville and Blue lake are doing good business | Daily Times | MF 10 | 6/30/1883 | 3 | 2 | Hotels | Scottsville Blue Lake | Hotels, Blue Lake, Scottsville, Joseph Greenwood |
| House fire across the street from Bel Air drive - in | Humboldt Times | MF 10 | 9/11/1958 | 3 | | Fire | Bel Air drive - in theater Pine Hill | House Fire, Drive - In Theater |
| House passed bill authorizing money for RW creek flood control project | Humboldt Times | MF 10 | 10/11/1962 | 3 | | Flood safety | Redwood creek Orick | Clement Miller, Rw Creek Flood Control Project |
| House passes bill for construction of the $225M Trinity River Div. Project | The Humboldt Times | MF 10 | 6/22/1955 | 1 | 1 & 2 | Vote | | Bill, Passed, Trinity River Div. Project, House Interior Committee |
| House races | Humboldt Times | MF 10 | 8/9/1953 | 27 | | History | South Park | Horse Races, South Park |
| House Rivers and Harbors Bill | Blue Lake Advocate | MF 2191 | 6/10/1916 | 8 | 3 | Humboldt Bay Jetties | North Jetty South Jetty | Navigation Survey, Legislation, Corps Of Engineers/Secretary Of War |
| Houses moved for freeway | Humboldt Times | MF 10 | 8/24/1951 | 2 | | Infrastructure - Roads | | Roads, Houses |
| Houses to be built for men building NWP railroad | The Humboldt Times | MF 10 | 10/17/1907 | 1 | 1 - 3 | New homes | Shively Bryan's Bluff | Carpenters, Shively, Nwp Rr |
| Housing Propose by Erin Pierson | Humboldt Times | MF 10 | 12/6/1955 | 2 | | Housing propose | | Housing Propose, Humboldt County , Tentative Map |
| Howe Truss Bridge | Humboldt Times | MF 10 | 12/18/1916 | 2 | 5 | Bridge | Salt River Ballou Ford Dobbyn Creek | Bridge, Salt River, Truss Bridge |
| HSU Buildings | Humboldt Times | MF 10 | 9/7/1963 | 9 | 4 | Buildings | HSU | Hsu, Buildings |
| Humboldt & Northern logging RR to be extended several miles | Morning Daily Humboldt Times | MF 10 | 6/3/1910 | 8 | 3 | Road work | | Carson, Timbered Land, Rr, Owned |
| Humboldt and Eastern Electric Railroad Committee received and approved report by J.N. Lentell | Daily Humboldt Times | MF 10 | 11/30/1909 | 1 | 1 | Meeting | | Report, Approved, J.N. Lentell, Humboldt & Eastern Electric Railroad |
