California - Criteria: C (architecture/engineering)
| Green Gables-Fleischhacker, Mortimer, Country House |
| Greenmeadow |
| Green-Rankin-Bembridge House |
| Green Shutter Hotel |
| Grether and Grether Building |
| Greystone Cellars |
| Greystone Villa-Cabin 18 |
| GRIFFING'S, FREDERICK, (ship) |
| Griffin, Willard, House and Carriage House |
| Griffith House |
| Griswold House |
| Grizzly Bluff School |
| Groshon, Sid, House |
| Gross, Courtlandt, House |
| Groveland Hotel |
| Guaranty Building |
| Gushaw-Mudgett House |
| Guthrie House |
| Haas Candy Factory |
| Haas-Lilienthal House |
| Hacienda Arms Apartments |
| Hackett, Edward Alexander Kelley, House |
| Hackett House |
| Hafley, Olan G. and Aida T., House |
| Hagemann Ranch Historic District |
| Haines, Alfred, House |
| Hakone Historic District |
| Hale Brothers Department Store |
| Hale House |
| Hale Solar Laboratory |
| Half Dome Cables and Trail |
| Halifax Apartments |
| Hallidie Building |
| Hall of Transportation, Treasure Island |
| Haman House |
| Hamilton Army Air Field Discontiguous Historic District |
| Hamilton, Capt. James A., House |
| Hamrick House |
| Hanford Carnegie Library |
| Hanna-Honeycomb House |
| Hansen, George, House |
| Hard, Roswell Butler, House |
| Harmony Grove Church |
| Harnetiaux Court |
| Harpel, Willis, House |
| Harrier, Daniel Webster, House |
| Hart Building |
| Hartwell, John S. House |
| Harvey House Railroad Depot |
| Harvey, Leo M., House |
| Haskett Court |
| Haslett Warehouse |
| Havens, Weston, House |
| Haviland Hall |
| Hawkins, Joel and Rena, House |
| Hawkins-Nimocks Estate-Patricio Ontiveros Adobe |
| Hawthorne Inn |
| Hayes Mansion |
| Hazel Hotel |
| Healdsburg Carnegie Library |
| Healdsburg Memorial Bridge |
| Hearst Greek Theatre |
| Hearst Gymnasium for Women |
| Hearst Memorial Mining Building |
| Hearst San Simeon Estate |
| Heilbron House |
| Heilman Villas |
| Heinold's First and Last Chance Saloon |
| Heinsbergen Decorating Company Building |
| Held-Poage House |
| Helme-Worthy Store and Residence |
| Henessey, Dr. Edwin, House |
| Hensley Historic District |
| Herald Hotel |
| HERCULES (tugboat) |
| Heritage House |
| Hermitage |
| Herschell, Allan, 3-Abreast Carousel |
| Hershell-Spillman Merry-Go-Round |
| Hetebrink House |
| Hicks House |
| Highland-Camrose Bungalow Village |
| Highland Historic District |
| Highland Park Masonic Temple |
| Highland Park Police Station |
| Hihn Building |
| Hilgard Hall |
| Hill-Carrillo Adobe |
| Hillcrest Park |
| Hillmont |
| Hillside School |
| Hinds, A. J., House |
| Hinds Hotel |
| Hockett Meadow Ranger Station |
| Hodgdon Homestead Cabin |
| Hofer Ranch |
| Hofman, Charles, House |
| Hofmann, Arthur and Mona, House |
| "Holbrook-Palmer Estate, ""Elmwood""" |
| Hollister Carnegie Library |
Data from United States Park Service and Wikidata
