| 1 | 1008 | Jul 2016 | Yuha Well | State | Imperial | |
| 2 | 620 | Jun 2014 | Yucaipa Rancheria | State | San Bernadino | |
| 3 | 528 | Jun 2014 | Yucaipa Adobe | State | San Bernadino | |
| 4 | 901 | Jul 2015 | Yreka | State | Siskiyou | |
| 5 | 564 | Jun 2015 | Yount Blockhouse Site | State | Napa | |
| 6 | 790 | May 2016 | Yosemite Valley | State | Mariposa | |
| 7 | 682 | Jun 2015 | York Cabin Site | State | Napa | |
| 8 | 191 | May 2016 | Yorba-Slaughter Adobe | State | San Bernadino | |
| 9 | 398 | Jul 2015 | Yankee Jims | State | Placer | |
| 10 | 874 | Oct 2014 | Workman Home | State | Los Angeles | |
| 11 | 874.1 | Oct 2014 | Workman Cemetery | State | Los Angeles | |
| 12 | 454 | Sep 2015 | Woodward's Gardens Site | State | San Francisco | |
| 13 | 93 | Apr 2015 | Woodside Store | State | San Mateo | |
| 14 | 163 | May 2015 | Wood's Ferry and Wood's Bridge Site | None | San Joaquin | |
| 15 | 851 | Mar 2015 | Woodland Opera House | State | Yolo | |
| 16 | 358 | May 2015 | Woodbridge | None | San Joaquin | |
| 17 | 804 | May 2014 | Wolfskill Grant | State | Solano | |
| 18 | 868 | May 2015 | Winchester House | State | Santa Clara | |
| 19 | 130 | Jan 2015 | Willow Springs | Other | Kern | |
| 20 | 415 | Jun 2015 | Willms Ranch | None | Stanislaus | |
| 21 | 719 | Jul 2014 | Wilder Grave | State | Sacramento | |
| 22 | 131 | Jul 2015 | Whiskeytown | None | Shasta | |
| 23 | 1003 | Mar 2015 | Wheatland Hop Riot Site | Other | Yuba | |
| 24 | 650 | Sep 2015 | What Cheer House Site | State | San Francisco | |
| 25 | 597 | Apr 2014 | What Cheer House | None | Sacramento | |
| 26 | 65 | Sep 2014 | Whaley House | State | San Diego | |
| 27 | 268 | Aug 2015 | West Point | State | Calaveras | |
| 28 | 658 | Jan 2015 | Western Hotel | State | Los Angeles | |
| 29 | 601 | Mar 2015 | Western Hotel | None | Sacramento | |
| 30 | 957 | Oct 2014 | Wente Brothers Winery | State | Alameda | |
| 31 | 140 | Jun 2015 | Wells Fargo Express Company Building | Other | Tuolumne | |
| 32 | 582 | Apr 2015 | Well, Hill 4 | Other | Santa Barbara | |
| 33 | 516 | May 2016 | Well, CSO 4 | Other | Los Angeles | |
| 34 | 581 | May 2015 | Well 2-6 | Other | Kern | |
| 35 | 165 | Oct 2014 | Weber Point | State | San Joaquin | |
| 36 | 709 | Jul 2015 | Weaverville Joss House | State | Trinity | |
| 37 | 993 | Mar 2016 | Watts Tower | Other | Los Angeles | |
| 38 | 624 | Jan 2015 | Warring Park | Other | Ventura | |
| 39 | 311 | Jun 2016 | Warner's Ranch | State | San Diego | |
| 40 | 893 | May 2014 | Walters Ranch Hop Kiln | State | Sonoma | |
| 41 | 969 | Jan 2015 | Wallis Home Site | State | Santa Clara | |
| 42 | 99 | Apr 2015 | Walker Pass | State | Kern | |
| 43 | 815 | Jun 2015 | Wakamatsu Tea and Silk Farm Colony | State | El Dorado | |
| 44 | 859 | Oct 2014 | Von Schmidt State Boundary Monument | State | San Bernadino | |
| 45 | 29 | Aug 2015 | Volcano | State | Amador | |
| 46 | 400 | Aug 2014 | Virginiatown | State | Placer | |
| 47 | 828 | Jun 2015 | Veterans Home of California | State | Napa | |
| 48 | 847 | Aug 2014 | Ventura County Courthouse | State | Ventura | |
| 49 | 259 | Jun 2014 | Vasquez Tree and Site of 21-Mile House | State | Santa Clara | |
| 50 | 351 | Apr 2015 | Vásquez House (Vasquez Adobe) | None | Monterey | |
| 51 | 443 | Nov 2015 | Valley Wells | State | Inyo | |
| 52 | 251 | May 2015 | Valley Springs | Other | Calaveras | |
| 53 | 46 | Jan 2015 | Vallejo Flour Mill | State | Alameda | |
| 54 | 4 | May 2017 | Vallejo Estate | Other | Sonoma | |
| 55 | 304 | Oct 2016 | Vallecito Stage Station | State | San Diego | |
| 56 | 370 | Aug 2015 | Vallecito Bell Monument | Other | Calaveras | |
| 57 | 273 | Aug 2015 | Vallecito | Other | Calaveras | |
| 58 | 1042 | Sep 2014 | USS Recruit | State | San Diego | |
| 59 | 1029 | Jan 2015 | USS Hornet | None | Alameda | |
| 60 | 946 | Jul 2014 | University of California, Berkeley | State | Alameda | |
| 61 | 623 | Sep 2015 | Union Square | Missing | San Francisco | |
| 62 | 996 | Jan 2015 | Union Oil Company | Other | Ventura | |
| 63 | 627 | May 2014 | Union Hotel and Union Hall Site | State | Sonoma | |
| 64 | 816 | Apr 2015 | Union Cemetery | State | San Mateo | |
| 65 | 1025 | Apr 2016 | Ukrania (Ukrainia) | State | Alameda | |
| 66 | 980 | Jun 2015 | Ukiah Vichy Springs Resort | State | Mendocino | |
| 67 | 939.3 | Jul 2016 | Twentieth Century Folk Art: Desert Tower | State | Imperial | |
| 68 | 124 | Aug 2015 | Tuttletown | State | Tuolumne | |
| 69 | 973 | May 2014 | Turner/Robertson Shipyard Site | State | Solano | |
| 70 | 375 | Apr 2015 | Tunitas Beach Indian Village | None | San Mateo | |
| 71 | 997 | Apr 2016 | Tuna Club of Avalon | State | Los Angeles | |
| 72 | 182 | Jul 2016 | Tumco Mines | State | Imperial | |
| 73 | 473 | Feb 2015 | Tule River Stage Station | State | Tulare | |
| 74 | 388 | Feb 2015 | Tule River Indian Reservation | State | Tulare | |
| 75 | 850.2 | Oct 2015 | Tule Lake Relocation Center | State | Modoc | |
| 76 | 374 | Jan 2015 | Tulamniu Indian Site | Other | Kern | |
| 77 | 146 | Jul 2015 | Trinidad Head | Other | Humboldt | |
| 78 | 216 | Jul 2015 | Trinidad | State | Humboldt | |
| 79 | 987 | Sep 2015 | Treasure Island | State | San Francisco | |
| 80 | 780.8 | Jul 2014 | Transcontinental Railroad - Western Base of the Sierra Nevada | State | Sacramento | |
| 81 | 780.6 | Aug 2014 | Transcontinental Railroad-Truckee | State | Nevada | |
| 82 | 780.7 | Jul 2014 | Transcontinental Railroad- Site of Completion of Pacific Railroad | Missing | San Joaquin | |
| 83 | 1023 | Feb 2015 | Transcontinental Railroad Depot | State | San Diego | |
| 84 | 780.9 | May 2015 | Transcontinental Railroad - Cape Horn Promontory | Other | Placer | |
| 85 | 780 | Mar 2015 | Transcontinental Railroad | State | Sacramento | |
| 86 | 995.1 | Aug 2014 | Trail of the John C. Frémont 1844 Expedition - Mono | Other | Mono | |
| 87 | 995 | Apr 2017 | Trail of the John C. Fremont 1844 Expedition | Other | San Joaquin | |
| 88 | 283 | May 2014 | Top Of Grapveine Pass, Where Don Pedro Fages Passed In 1772 | State | Kern | |
| 89 | 1054 | Nov 2015 | Tomo Kahni | State | Kern | |
| 90 | 649 | Jul 2015 | Tolowa Indian Village Site | State | Del Norte | |
| 91 | 384 | Apr 2016 | Timms' Point and Landing | State | Los Angeles | |
| 92 | 320 | Jul 2015 | Timbuctoo | State | Yuba | |
| 93 | 929 | Mar 2015 | Thompson Seedless Grape Site | State | Sutter | |
| 94 | 1010 | Sep 2015 | Third Baptist Church Site | State | San Francisco | |
| 95 | 1055 | Sep 2015 | The Mystery Spot | Soon | Santa Cruz | |
| 96 | 387 | Sep 2015 | THE GLASS HOUSE, CASA MATERNA OF THE VALLEJOS | None | Monterey | |
| 97 | 506 | Jun 2015 | THE COMMUNITY METHODIST CHURCH OF IONE | State | Amador | |
| 98 | 653 | Nov 2015 | The Cascades | Missing | Los Angeles | |
| 99 | 934.01 | Mar 2015 | Temporary Japanese American Detention Camp/Assembly Center - Marysville | Other | Yuba | |
| 100 | 934.00 | Jul 2014 | Temporary Japanese American Detention Camp/Assembly Center -Fresno | State | Fresno | |
| 101 | 934.11 | Jul 2014 | Temporary Detention Camp for Japanese Americans/Turlock Assembly Center | None | Stanislaus | |
| 102 | 934.10 | Oct 2014 | Temporary Detention Camp for Japanese Americans/Tulare Assembly Center | None | Tulare | |
| 103 | 934.09 | Apr 2015 | Temporary Detention Camp for Japanese Americans/Tanofran Assembly Center | Other | San Mateo | |
| 104 | 934.08 | Oct 2014 | Temporary Detention Camp for Japanese Americans/Stockton Assembly Center | State | San Joaquin | |
| 105 | 934.07 | Apr 2016 | Temporary Detention Camp for Japanese Americans/Santa Anita Assembly Center | Other | Los Angeles | |
| 106 | 934.06 | Nov 2014 | Temporary Detention Camp for Japanese Americans/Salinas Assembly Center | State | Monterey | |
| 107 | 934.05 | Aug 2014 | Temporary Detention Camp for Japanese Americans/Sacramento Assembly Center | Other | Sacramento | |
| 108 | 934.04 | Mar 2017 | Temporary Detention Camp for Japanese Americans/Pomona Assembly Center | Other | Los Angeles | |
| 109 | 934.03 | Oct 2014 | Temporary Detention Camp for Japanese Americans/Pinedale Assembly Center | State | Fresno | |
| 110 | 934.02 | Jul 2014 | Temporary Detention Camp for Japanese Americans/Merced Assembly Center | State | Merced | |
| 111 | 927 | Jun 2015 | Temple of Kwan Tai | Other | Mendocino | |
| 112 | 765 | Apr 2017 | Temple Israel Cemetery | State | San Joaquin | |
| 113 | 237 | May 2014 | Temelec Hall | State | Sonoma | |
| 114 | 91 | Sep 2015 | Telegraph Hill | Other | San Francisco | |
| 115 | 643 | Jan 2015 | Tehachapi Old Town | State | Kern | |
| 116 | 508 | Jan 2015 | Tehachapi Loop | Other | Kern | |
| 117 | 1034 | Jul 2016 | Tecolote Rancho Site | State | Imperial | |
| 118 | 360 | Sep 2014 | Tapia Adobe | State | San Bernadino | |
| 119 | 413 | Feb 2015 | Tailholt | State | Tulare | |
| 120 | 756 | Jan 2015 | Sycamore Tree | Missing | Ventura | |
| 121 | 573 | Oct 2014 | Sycamore Grove | Other | San Bernadino | |
| 122 | 496 | Apr 2014 | Swiss Hotel | State | Sonoma | |
| 123 | 238 | Mar 2015 | Swift's Stone Corral | None | Colusa | |
| 124 | 345 | Jun 2015 | Swift Adobe | Other | Glenn | |
| 125 | 593 | Mar 2015 | Sutterville | Other | Sacramento | |
| 126 | 591 | Jul 2014 | Sutter's Landing | State | Sacramento | |
| 127 | 525 | Jul 2014 | Sutter's Fort | Other | Sacramento | |
| 128 | 322 | Jun 2015 | Sutter Creek | Other | Amador | |
| 129 | 926 | Jun 2015 | Sun House | State | Mendocino | |
| 130 | 407 | Jun 2015 | Summersville (Tuolumne) | State | Tuolumne | |
| 131 | 428 | Jun 2015 | Sulphur Bank Mine Site | Missing | Lake | |
| 132 | 630 | Jun 2015 | St. Vincent's School for Boys | State | Marin | |
| 133 | 567 | Mar 2016 | St. Vincent's Place (Court) | State | Los Angeles | |
| 134 | 142 | Mar 2015 | Studebaker's Shop Site | Other | El Dorado | |
| 135 | 396 | Jul 2015 | Strawberry Valley Stage Station | Other | Siskiyou | |
| 136 | 450 | Jun 2015 | Stone House | State | Lake | |
| 137 | 263 | May 2015 | Stone Corral | None | Calaveras | |
| 138 | 426 | Jun 2015 | Stone And Kelsey Home | State | Lake | |
| 139 | 578 | Oct 2014 | Stoddard-Waite Monument | Other | San Bernadino | |
| 140 | 1016 | Oct 2014 | Stockton Developmental Center | State | San Joaquin | |
| 141 | 919 | Mar 2017 | St. Francis Dam Disaster Site | State | Los Angeles | |
| 142 | 788 | Jun 2015 | Stewart Store | State | Amador | |
| 143 | 352 | Jan 2017 | Stevenson House | Other | Monterey | |
| 144 | 769 | Aug 2015 | Stevenot Birthplace | Other | Calaveras | |
| 145 | 906 | Oct 2015 | Steele Brothers Dairy Ranches | State | San Mateo | |
| 146 | 991 | Jul 2014 | State Indian Museum | Other | Sacramento | |
| 147 | 869 | Jul 2014 | State Capitols Site | State | Sacramento | |
| 148 | 461 | May 2015 | State Capitol Site | Other | Santa Clara | |
| 149 | 574 | May 2014 | State Capitol in Vallejo | Other | Solano | |
| 150 | 153 | May 2014 | State Capitol in Benicia | State | Solano | |
| 151 | 872 | Jul 2014 | State Capitol Complex | State | Sacramento | |
| 152 | 1030 | Sep 2014 | Star of India | State | San Diego | |
| 153 | 614 | Mar 2015 | Stanford-Lathrop House | State | Sacramento | |
| 154 | 659 | May 2015 | Stagecoach Inn | Missing | Ventura | |
| 155 | 598 | Apr 2014 | Stage and Railroad Site | None | Sacramento | |
| 156 | 497 | Jul 2015 | S.S. Emidio | State | Del Norte | |
| 157 | 894 | Apr 2016 | SS Catalina | Other | Los Angeles | |
| 158 | 857 | Jan 2015 | Squire House | State | Santa Clara | |
| 159 | 432 | Jun 2015 | Springfield | Other | Tuolumne | |
| 160 | 481 | Oct 2015 | Spanish Ranch and Meadow Valley | Other | Plumas | |
| 161 | 891 | Sep 2014 | Spanish Landing | State | San Diego | |
| 162 | 989 | Jul 2016 | Soviet Transpolar Landing Site | Other | Riverside | |
| 163 | 832 | Jul 2015 | South Yuba Canal Office | State | Nevada | |
| 164 | 33 | Jul 2015 | Southern's Stage Station | Other | Shasta | |
| 165 | 955 | Jan 2015 | Southern Pacific Depot: Menlo Park | State | San Mateo | |
| 166 | 846 | Apr 2015 | Southern Pacific Depot: Burlingame | State | San Mateo | |
| 167 | 420 | Jun 2015 | Soulsbyville | State | Tuolumne | |
| 168 | 422 | Jun 2015 | Sonora-Mono Road | State | Tuolumne | |
| 169 | 712 | Nov 2014 | Soberanes Adobe | Other | Monterey | |
| 170 | 994 | Jun 2014 | Smiley Public Library | State | San Bernadino | |
| 171 | 321 | Jul 2015 | Smartsville | None | Yuba | |
| 172 | 575 | Jul 2014 | Sloughhouse | State | Sacramento | |
| 173 | 789 | Mar 2016 | Site of the Los Angeles Star | State | Los Angeles | |
| 174 | 380 | Apr 2016 | Site of the Diego Sepúlveda Adobe | None | Los Angeles | |
| 175 | 478 | Apr 2015 | Site of San Mateo County's First Sawmill | State | San Mateo | |
| 176 | 676 | Jul 2014 | Site of Saint Mary's College | Other | Alameda | |
| 177 | 654 | Jul 2014 | Site of Jewish Synagogue | State | Sacramento | |
| 178 | 718 | Mar 2016 | Site of Initial United States Air Meet | State | Los Angeles | |
| 179 | 346 | Mar 2015 | Site of Hock Farm | State | Sutter | |
| 180 | 87 | Sep 2015 | Site of First United States Branch Mint in California | State | San Francisco | |
| 181 | 1048 | Apr 2015 | Site of Echo Summit | State | El Dorado | |
| 182 | 45 | Jul 2014 | Site of College of California | State | Alameda | |
| 183 | 469 | Apr 2015 | Site of Center of Villa de Branciforte | State | Santa Cruz | |
| 184 | 540 | Jan 2015 | Sinks of the Tejón | State | Kern | |
| 185 | 202 | Apr 2016 | Silverado | State | Orange | |
| 186 | 1039 | Jul 2014 | Sikh Temple | None | San Joaquin | |
| 187 | 1053 | Jun 2015 | Sierra Railway Shops | State | Tuolumne | |
| 188 | 971 | Oct 2015 | Sierra County Sheriff's Gallows | State | Sierra | |
| 189 | 83 | Sep 2015 | Shoreline Markers | Other | San Francisco | |
| 190 | 456 | Mar 2015 | Shingle Springs | State | El Dorado | |
| 191 | 335 | Jul 2014 | Shell Mound Site | Other | Alameda | |
| 192 | 439 | Jul 2014 | Sheldon Grist Mill Site | State | Sacramento | |
| 193 | 395 | Jun 2015 | Shaw's Flat | State | Tuolumne | |
| 194 | 1022 | Feb 2015 | Shafter Cotton Research Station | State | Kern | |
| 195 | 764 | Feb 2015 | Sessions Nursery Site | State | San Diego | |
| 196 | 522 | Apr 2016 | Serra Springs | Other | Los Angeles | |
| 197 | 67 | Sep 2014 | Serra Palm Site | State | San Diego | |
| 198 | 186 | May 2016 | Serrano Tanning Vats | State | Riverside | |
| 199 | 185 | May 2016 | Serrano Boulder | None | Riverside | |
| 200 | 199 | Apr 2016 | Serrano Adobe | Other | Orange | |
| 201 | 460 | Jun 2015 | Second Garrote | State | Tuolumne | |
| 202 | 726 | Apr 2015 | Sebastian Store | State | San Luis Obispo | |
| 203 | 739 | Apr 2014 | Sebastiani Vineyard and Winery | State | Sonoma | |
| 204 | 133 | Jul 2014 | Sebastian Indian Reservation | Other | Kern | |
| 205 | 474 | Apr 2015 | Searsville Site | State | San Mateo | |
| 206 | 774 | Nov 2015 | Searles Lake Borax Discovery | State | San Bernadino | |
| 207 | 561 | Jun 2015 | Schramsberg Vineyard | State | Napa | |
| 208 | 424 | Jun 2015 | Sawmill Flat | State | Tuolumne | |
| 209 | 1046 | Apr 2016 | Savannah Memorial Park | State | Los Angeles | |
| 210 | 527 | May 2016 | Savage Trading Post | Other | Mariposa | |
| 211 | 691 | Sep 2015 | Sarcophagus of Thomas Starr King | State | San Francisco | |
| 212 | 435 | May 2015 | Saratoga | State | Santa Clara | |
| 213 | 369 | Jun 2016 | Santa Ysabel Chapel | State | San Diego | |
| 214 | 1005 | Nov 2016 | Santa Rosa Rancho | Other | Riverside | |
| 215 | 1026 | Jul 2016 | Santa Margarita Ranchhouse | State | San Diego | |
| 216 | 364 | Aug 2014 | Santa Margarita de Cortona Asistencia | None | San Luis Obispo | |
| 217 | 576 | Oct 2014 | Santa Fe and Salt Lake Trail Monument | Other | San Bernadino | |
| 218 | 983 | Mar 2014 | Santa Cruz Beach Boardwalk | State | Santa Cruz | |
| 219 | 260 | May 2015 | Santa Clara Campaign Treaty Site | State | Santa Clara | |
| 220 | 785 | Oct 2016 | Santa Catarina | State | San Diego | |
| 221 | 1037 | Apr 2015 | Santa Barbara County Courthouse | State | Santa Barbara | |
| 222 | 533 | Jun 2016 | San Pasqual Battlefield | State | San Diego | |
| 223 | 824 | Jan 2015 | San Leandro Oyster Beds | Missing | Alameda | |
| 224 | 520 | May 2015 | San Joaquin Valley College Site | State | San Joaquin | |
| 225 | 777 | Jul 2014 | San Joaquin City Site | Missing | San Joaquin | |
| 226 | 673 | Oct 2016 | San Gregorio | State | San Diego | |
| 227 | 208 | Aug 2014 | San Francis Ranch | State | Inyo | |
| 228 | 394 | Oct 2015 | San Francisco Bay Discovery Site Plaque | State | San Mateo | |
| 229 | 753 | Nov 2015 | San Fernando Cemetery | State | Los Angeles | |
| 230 | 793 | Oct 2016 | San Felipe Valley and Stage Station | State | San Diego | |
| 231 | 253 | Aug 2015 | Sandy Gulch | Other | Calaveras | |
| 232 | 63 | Sep 2014 | San Diego Viejo Plaza | Other | San Diego | |
| 233 | 798 | Mar 2015 | San Diego State College | State | San Diego | |
| 234 | 59 | Apr 2014 | San Diego Presidio Site | State | San Diego | |
| 235 | 523 | Sep 2014 | San Diego Barracks | State | San Diego | |
| 236 | 391 | Apr 2015 | Sánchez Adobe | State | San Mateo | |
| 237 | 114.1 | Aug 2014 | San Buenaventura Mission Aqueduct | None | Ventura | |
| 238 | 42 | Aug 2015 | San Bernardino Asistencia | Missing | San Bernadino | |
| 239 | 252 | Aug 2015 | San Andreas | Other | Calaveras | |
| 240 | 501 | Apr 2014 | Salvador Vallejo Adobe | State | Sonoma | |
| 241 | 571 | Mar 2015 | Salmon Falls | Missing | El Dorado | |
| 242 | 820 | Jun 2015 | Saint Teresa of Avila Church | State | Sonoma | |
| 243 | 862 | May 2014 | Saint Paul's Episcopal Church | State | Solano | |
| 244 | 910 | May 2015 | Saint Joseph's Roman Catholic Church | Other | Santa Clara | |
| 245 | 139 | Jun 2015 | Saint James Episcopal Church | Other | Tuolumne | |
| 246 | 437 | Jul 2014 | Sailing Launch Comet | State | San Joaquin | |
| 247 | 605 | Mar 2015 | Sacramento Union Site | None | Sacramento | |
| 248 | 566 | Mar 2015 | Sacramento City Cemetery | State | Sacramento | |
| 249 | 611 | Jul 2014 | Sacramento Bee Building | None | Sacramento | |
| 250 | 749 | Nov 2016 | Saahatpa | State | Riverside | |
| 251 | 224 | May 2016 | Ruins of the Third Serrano Adobe | Other | Riverside | |
| 252 | 102 | Aug 2015 | Rubidoux House | None | Riverside | |
| 253 | 303 | Aug 2015 | Rubidoux Grist Mill | Other | Riverside | |
| 254 | 636 | Apr 2015 | ROYAL SPANISH PRESIDIO | State | Santa Barbara | |
| 255 | 105 | Apr 2015 | Royal Presidio Chapel | Other | Monterey | |
| 256 | 674 | Oct 2015 | Round Valley | State | Mendocino | |
| 257 | 294 | Jul 2015 | Rough and Ready | State | Nevada | |
| 258 | 300 | Jul 2014 | Rose Station | Other | Kern | |
| 259 | 76 | Oct 2015 | Roop's Fort | Other | Lassen | |
| 260 | 362 | Mar 2016 | Rómulo Pico Adobe | Other | Los Angeles | |
| 261 | 779 | May 2014 | Rockville Stone Chapel | State | Solano | |
| 262 | 276 | Aug 2015 | Robinson's Ferry | State | Calaveras | |
| 263 | 898 | May 2015 | Roberto-Suñol Adobe | State | Santa Clara | |
| 264 | 710 | Jun 2015 | Robert Louis Stevenson State Park | Other | Napa | |
| 265 | 936 | Aug 2014 | Rios-Caledonia Adobe | State | San Luis Obispo | |
| 266 | 385 | Apr 2016 | Rio San Gabriel Battlefield | State | Los Angeles | |
| 267 | 84 | Sep 2015 | Rincon Hill | State | San Francisco | |
| 268 | 1032 | Jun 2014 | Richmond Shipyards District | None | Contra Costa | |
| 269 | 337 | Oct 2015 | Rich Bar | State | Plumas | |
| 270 | 494 | Apr 2015 | Richardson Adobe (Los Coches Rancho) | Missing | Monterey | |
| 271 | 1015 | Apr 2016 | Richard Nixon Birthplace | State | Orange | |
| 272 | 12 | Jun 2015 | Residence of General William B. Ide | State | Tehama | |
| 273 | 203 | Oct 2014 | Red Hill | Other | Orange | |
| 274 | 32 | Jul 2015 | Reading's Bar | State | Shasta | |
| 275 | 10 | Jul 2015 | Reading Adobe | State | Shasta | |
| 276 | 938 | Nov 2015 | Rand Mining District | State | Kern | |
| 277 | 979 | May 2015 | Rancho Simi | State | Ventura | |
| 278 | 982 | Apr 2016 | Rancho Santa Fe | State | San Diego | |
| 279 | 556 | May 2014 | Rancho San Francisco | State | Los Angeles | |
| 280 | 246 | Jan 2015 | Rancho San Antonio (Peralta Grant) | State | Alameda | |
| 281 | 1033 | Aug 2014 | Rancho Nipomo | State | San Luis Obispo | |
| 282 | 978 | Mar 2016 | Rancho Los Cerritos Historic Site | State | Los Angeles | |
| 283 | 940 | Mar 2015 | Rancho Guajome | State | San Diego | |
| 284 | 942 | May 2016 | Rancho Chino Adobe | State | San Bernadino | |
| 285 | 329 | Jun 2015 | Rancho Chico and Bidwell Adobe | State | Butte | |
| 286 | 553 | Jan 2015 | Rancho Camulos | Other | Ventura | |
| 287 | 1009 | Jul 2016 | Ramona Bowl | State | Riverside | |
| 288 | 856 | Apr 2015 | Ralston Hall | State | San Mateo | |
| 289 | 970 | Jan 2015 | Rainbow Trout Species Identified | State | Alameda | |
| 290 | 286 | Aug 2015 | Rail Road Flat | State | Calaveras | |
| 291 | 950 | Jul 2016 | Rabbit Experimental Station | State | San Bernadino | |
| 292 | 213 | Oct 2015 | Rabbit Creek Hotel Monument | Other | Plumas | |
| 293 | 223 | Aug 2014 | Putnam's Cabin | State | Inyo | |
| 294 | 175 | May 2014 | Protestant Church Site | Other | Solano | |
| 295 | 735 | Aug 2015 | Prince-Garibardi Building | State | Calaveras | |
| 296 | 867 | Jul 2016 | Preston Castle | State | Amador | |
| 297 | 316 | Apr 2014 | Presidio of Sonoma | Other | Sonoma | |
| 298 | 79 | Sep 2015 | Presidio of San Francisco | State | San Francisco | |
| 299 | 464 | Jul 2014 | Prairie City Site | State | Sacramento | |
| 300 | 831 | Jun 2015 | Posted Water Notice Site | Other | Glenn | |
