California - Area of significance: Engineering
| Alcatraz |
| Alexander-Acacia Bridge |
| Andreas Canyon |
| Angels Flight Railway |
| Arc Jet Complex |
| Arroyo Seco Parkway Historic District |
| Atchison, Topeka, and Santa Fe Railway Steam Locomotive No. 3751 |
| Battery John Barlow and Saxton |
| Battery Osgood-Farley |
| Bear Harbor Landing Historical and Archaeological District |
| Belt Railroad Engine House and Sandhouse |
| BERKELEY |
| Big Creek Hydroelectric System Historic District |
| Big Gap Flume |
| Black Diamond Mines |
| Boca Dam |
| Bridgeport Covered Bridge |
| BROTHER JONATHAN (Shipwreck Site) |
| Burro Schmidt's Tunnel |
| Calaveritas Creek Bridge |
| California Memorial Stadium |
| Camera Obscura |
| Carneros Creek Bridge on Old Sonoma Road |
| Coachella Valley Fish Traps |
| Colorado Street Bridge |
| Commercial Exchange Building |
| Crawford Ditch |
| Davis Subway |
| Derby, James Daniel, House |
| Dinkey Creek Bridge |
| Drydock 4 Hunters Point Naval Shipyard |
| ELECTRA (motor yacht) |
| EUREKA |
| Fair Oaks Bridge, Old, |
| Felton Covered Bridge |
| Fernbridge |
| Fire Station No. 23 |
| First Street Bridge |
| Fisk’s Mill Landing Historical and Archaeological District |
| Five Mile Drive-Sutter Creek Bridge |
| Flight And Guidance Simulation Laboratory |
| Folger Coffee Company Building |
| Folsom Powerhouse |
| Foote's Crossing Road |
| Fort Ross Landing Historical and Archaeological District |
| Garnett Creek Bridge on CA 29 |
| Garnett Creek Bridge on Greenwood Avenue |
| Georgia Street Bridge-Caltrans Bridge |
| Gianella Bridge |
| Gladstone Houses |
| Golden Gate Park Conservatory |
| Grand Boulevard Historic District |
| Great Sierra Wagon Road |
| Green Brae Brick Yard |
| Harvey House Railroad Depot |
| Hattie (Gold Bug), Priest and Silver Pine Mines and Stampmill |
| Healdsburg Memorial Bridge |
| HERCULES (tugboat) |
| Hewlett-Packard House and Garage |
| Higgins Building |
| Hotel Stockton |
| Hunters Point Commercial Drydock Historic District |
| Huntington Beach Municipal Pier |
| I Street Bridge |
| Judson and Brown Ditch |
| Kelso Depot, Restaurant and Employees Hotel |
| Kennedy Mine Historic District |
| Kennedy Tailing Wheels |
| Knight's Foundry and Shops |
| Kress, George R., House |
| Lake Tahoe Dam |
| LCS-102 (landing craft support) |
| Lower Blackburn Grade Bridge |
| Lydia, The |
| Marinship Machine Shop |
| Maxwell Creek Bridge on Hardin Road |
| McClintock Storage Warehouse |
| McMullen, John, House |
| Merrill, Charles W., House |
| Michigan Bluff-Last Chance Trail |
| Midway-Sunset Jack Plant |
| Millard House |
| Mill Creek Zanja |
| Milliken Creek Bridge |
| Mission Beach Roller Coaster |
| Moro Rock Stairway |
| Mountain Quarries Bridge |
| Mount Lowe Railway |
| Napa County Infirmary |
| Napa River Bridge on Zinfandel Lane |
| NASA Ames Wind Tunnel Historic District |
| Navarro |
| Niagara Camp |
| Niles Canyon Transcontinental Railroad Historic District |
| Oaklawn Bridge and Waiting Station |
| Old Fresno Water Tower |
| Old Mission Dam |
| Oregon Creek Covered Bridge |
| Otis Elevator Company Building |
| Ott's Assay Office |
Data from United States Park Service and Wikidata
