California - Criteria: A (event)
| Hazel Hotel |
| Healdsburg Carnegie Library |
| Healdsburg Memorial Bridge |
| Heathcote-MacKenzie House |
| Helme-Worthy Store and Residence |
| Hendrick, William T., House |
| HERCULES (tugboat) |
| Hetch Hetchy Railroad Engine No.6 |
| Hewlett-Packard House and Garage |
| Highland Historic District |
| Highland Park Masonic Temple |
| Highland Park Police Station |
| Highway 152 Tree Row |
| Hihn Building |
| Hill-Carrillo Adobe |
| Hillcrest Park |
| Hockett Meadow Ranger Station |
| Hodgdon Homestead Cabin |
| Hofer Ranch |
| Hollister Carnegie Library |
| Holly Street Livery Stable |
| Hollywood Argyle Apartments |
| Hollywood Boulevard Commercial and Entertainment District |
| Hollywood Cemetery |
| Hollywood High School Historic District |
| Hollywood Masonic Temple |
| Hollywood Palladium |
| Hollywood Studio Club |
| Hollywood Western Building, The |
| Holy Trinity Armenian Apostolic Church |
| Holy Trinity Church |
| Holzwasser-Walker Scoot Building and Owl Drug Building |
| Home Economics Building |
| Honey Run Covered Bridge |
| Honigsberger Store |
| Hood, William, House |
| Hoopa Valley Adobe |
| Horatio West Court |
| Hornitos Masonic Hall No. 98 |
| Horseshoe Lake Ranger Station |
| Hospital Bridge |
| Hospital Rock |
| Hospital Rock Army Camp Site |
| Hostess House |
| Hotel Arcata |
| Hotel Californian |
| Hotel Charlotta |
| Hotel Charlotte |
| Hotel Chauvet |
| Hotel Fresno |
| Hotel Green |
| Hotel La Rose |
| Hotel Lodi |
| Hotel Macdoel |
| Hotel Metropole |
| Hotel Rosslyn Annex |
| Hotel Sainte Claire |
| Hotel San Clemente |
| Hotel Senator |
| Hotel St. Matthew |
| Hotel Stockton |
| Hotel Woodland |
| Howard Motor Company Building |
| Howard-Ralston Eucalyptus Tree Rows |
| Howe-Waffle House and Carriage House |
| Humboldt Bay Life-Saving Station |
| Humboldt Bay Woolen Mill |
| Hunter-Dulin Building |
| Hunters Point Commercial Drydock Historic District |
| Huntington Beach Municipal Pier |
| Huntington Beach Public Library on Triangle Park |
| Imperial Theatre |
| Independent Order of Odd Fellows Building |
| Initial Point of Boundary Between U.S. and Mexico |
| Inskip Hotel |
| Integratron |
| International Hotel |
| Inyo County Courthouse |
| Ione City Centenary Church |
| I.O.O.F. Building |
| I.O.O.F. Hall |
| IOOF Lodge #355 |
| Irvine Bean and Growers Association Building |
| Irvine Blacksmith Shop |
| Irving, Washington, Branch |
| Isleton Chinese and Japanese Commercial Districts |
| I Street Bridge |
| Jackson Downtown Historic District |
| Jackson, Helen Hunt, Branch |
| Jackson Square Historic District |
| Jacoby Building |
| Janssen, E., Building |
| Janssens-Orella-Birk Building |
| Jastro Building |
| Jefferson Branch |
| Jensen, Cornelius, Ranch |
| Jersey Bridge |
| Jess Valley Schoolhouse |
| John Muir National Historic Site |
| Johnson-Taylor Ranch Headquarters |
Data from United States Park Service and Wikidata
