Counties in California

• Alameda (147 historic properties)
• Alpine (2 historic properties)
• Amador (19 historic properties)
• Butte (26 historic properties)
• Calaveras (15 historic properties)
• Colusa (6 historic properties)
• Contra Costa (39 historic properties)
• Del Norte (12 historic properties)
• El Dorado (18 historic properties)
• Fresno (40 historic properties)
• Glenn (2 historic properties)
• Humboldt (53 historic properties)
• Imperial (10 historic properties)
• Inyo (17 historic properties)
• Kern (23 historic properties)
• Kings (4 historic properties)
• Lake (7 historic properties)
• Lassen (6 historic properties)
• Los Angeles (485 historic properties)
• Madera (1 historic property)
• Marin (40 historic properties)
• Mariposa (35 historic properties)
• Mendocino (40 historic properties)
• Merced (15 historic properties)
• Modoc (18 historic properties)
• Mono (5 historic properties)
• Monterey (56 historic properties)
• Napa (78 historic properties)
• Nevada (22 historic properties)

• Orange (112 historic properties)
• Placer (23 historic properties)
• Plumas (5 historic properties)
• Riverside (55 historic properties)
• Sacramento (90 historic properties)
• San Benito (13 historic properties)
• San Bernardino (58 historic properties)
• San Diego (132 historic properties)
• San Francisco (179 historic properties)
• San Joaquin (35 historic properties)
• San Luis Obispo (31 historic properties)
• San Mateo (50 historic properties)
• Santa Barbara (41 historic properties)
• Santa Clara (104 historic properties)
• Santa Cruz (44 historic properties)
• Shasta (26 historic properties)
• Sierra (7 historic properties)
• Siskiyou (17 historic properties)
• Solano (24 historic properties)
• Sonoma (64 historic properties)
• Stanislaus (22 historic properties)
• Sutter (1 historic property)
• Tehama (10 historic properties)
• Trinity (4 historic properties)
• Tulare (34 historic properties)
• Tuolumne (28 historic properties)
• Ventura (35 historic properties)
• Yolo (22 historic properties)
• Yuba (11 historic properties)