| 301 | 819 | Sep 2015 | Hudson's Bay Company Site | State | San Francisco | |
| 302 | 459 | Sep 2015 | Mellus and Howard Site | None | San Francisco | |
| 303 | 85 | Sep 2015 | Office of the California Star Newspaper Site | Other | San Francisco | |
| 304 | 87 | Sep 2015 | Site of First United States Branch Mint in California | State | San Francisco | |
| 305 | 89 | Sep 2015 | Parrott Granite Block Site | None | San Francisco | |
| 306 | 81 | Sep 2015 | Montgomery Landing Place | Other | San Francisco | |
| 307 | 387 | Sep 2015 | THE GLASS HOUSE, CASA MATERNA OF THE VALLEJOS | None | Monterey | |
| 308 | 448 | Sep 2015 | Patchen | State | Santa Clara | |
| 309 | 860 | Sep 2015 | Hihn Building, SUPERINTENDENT'S OFFICE, 'Camp Capitola' | State | Santa Cruz | |
| 310 | 998 | Sep 2015 | Castro Adobe | Other | Santa Cruz | |
| 311 | 1055 | Sep 2015 | The Mystery Spot | Soon | Santa Cruz | |
| 312 | 20 | Aug 2015 | Parent Washington Navel Orange Tree | Other | Riverside | |
| 313 | 943 | Aug 2015 | Jensen Alvarado Ranch | State | Riverside | |
| 314 | 121 | Aug 2015 | Agua Mansa | Other | San Bernadino | |
| 315 | 617 | Aug 2015 | Fort Benson | Other | San Bernadino | |
| 316 | 303 | Aug 2015 | Rubidoux Grist Mill | Other | Riverside | |
| 317 | 95 | Aug 2015 | Guachama Rancheria | Other | San Bernadino | |
| 318 | 761 | Aug 2015 | Mission Inn | State | Riverside | |
| 319 | 42 | Aug 2015 | San Bernardino Asistencia | Missing | San Bernadino | |
| 320 | 787 | Aug 2015 | De Anza Crossing of the Santa Ana River | Other | Riverside | |
| 321 | 102 | Aug 2015 | Rubidoux House | None | Riverside | |
| 322 | 956 | Aug 2015 | California Caverns at Cave City | Other | Calaveras | |
| 323 | 282 | Aug 2015 | El Dorado | Other | Calaveras | |
| 324 | 465 | Aug 2015 | Old Mining Camp of Brownsville | State | Calaveras | |
| 325 | 769 | Aug 2015 | Stevenot Birthplace | Other | Calaveras | |
| 326 | 273 | Aug 2015 | Vallecito | Other | Calaveras | |
| 327 | 466 | Aug 2015 | Peter L. Traver Building | State | Calaveras | |
| 328 | 255 | Aug 2015 | Calaveritas | State | Calaveras | |
| 329 | 271 | Aug 2015 | Pioneer Cemetery | None | Calaveras | |
| 330 | 267 | Aug 2015 | Mitchler Hotel (Murphy's Hotel) | State | Calaveras | |
| 331 | 272 | Aug 2015 | Douglas Flat | Other | Calaveras | |
| 332 | 124 | Aug 2015 | Tuttletown | State | Tuolumne | |
| 333 | 734 | Aug 2015 | Angels Hotel | State | Calaveras | |
| 334 | 275 | Aug 2015 | Murphys | Other | Calaveras | |
| 335 | 288 | Aug 2015 | Altaville | Other | Calaveras | |
| 336 | 258 | Aug 2015 | Fourth Crossing | State | Calaveras | |
| 337 | 735 | Aug 2015 | Prince-Garibardi Building | State | Calaveras | |
| 338 | 287 | Aug 2015 | Angels Camp | Other | Calaveras | |
| 339 | 276 | Aug 2015 | Robinson's Ferry | State | Calaveras | |
| 340 | 370 | Aug 2015 | Vallecito Bell Monument | Other | Calaveras | |
| 341 | 138 | Aug 2015 | Mark Twain Cabin Historic Markers | State | Tuolumne | |
| 342 | 274 | Aug 2015 | Carson Hill | State | Calaveras | |
| 343 | 499 | Aug 2015 | Altaville Grammar School | State | Calaveras | |
| 344 | 36 | Aug 2015 | Middle Bar | None | Amador | |
| 345 | 261 | Aug 2015 | Mokelumne Hill Congregational Church | None | Calaveras | |
| 346 | 1001 | Aug 2015 | California Native American Ceremonial Roundhouses, Chaw Se' Roundhouse | State | Amador | |
| 347 | 286 | Aug 2015 | Rail Road Flat | State | Calaveras | |
| 348 | 256 | Aug 2015 | Mokelumne Hill IOOF Hall | None | Calaveras | |
| 349 | 37 | Aug 2015 | Clinton | Other | Amador | |
| 350 | 41.1 | Aug 2015 | Big Bar - Calaveras | None | Calaveras | |
| 351 | 663 | Aug 2015 | COURTHOUSE OF CALAVERAS COUNTY and the Leger Hotel | State | Calaveras | |
| 352 | 29 | Aug 2015 | Volcano | State | Amador | |
| 353 | 715 | Aug 2015 | FIRST ASTRONOMICAL OBSERVATORY IN CALIFORNIA | State | Amador | |
| 354 | 41 | Aug 2015 | Big Bar - Amador | None | Amador | |
| 355 | 268 | Aug 2015 | West Point | State | Calaveras | |
| 356 | 284 | Aug 2015 | Jesus Maria | None | Calaveras | |
| 357 | 265 | Aug 2015 | Chili Gulch | State | Calaveras | |
| 358 | 39 | Aug 2015 | Butte Store | Other | Amador | |
| 359 | 280 | Aug 2015 | Glencoe (Mosquito Gulch) | None | Calaveras | |
| 360 | 253 | Aug 2015 | Sandy Gulch | Other | Calaveras | |
| 361 | 295 | Aug 2015 | Paloma | State | Calaveras | |
| 362 | 269 | Aug 2015 | Mokelumne Hill | Other | Calaveras | |
| 363 | 252 | Aug 2015 | San Andreas | Other | Calaveras | |
| 364 | 1051 | Jul 2015 | Mountain Quarries Railroad Bridge | State | El Dorado | |
| 365 | 911 | Jul 2015 | Chatsworth Calera | None | Los Angeles | |
| 366 | 363 | Jul 2015 | Centinela Springs | State | Los Angeles | |
| 367 | 852 | Jul 2015 | North Bloomfield Mining and Gravel Company | State | Nevada | |
| 368 | 320 | Jul 2015 | Timbuctoo | State | Yuba | |
| 369 | 321 | Jul 2015 | Smartsville | None | Yuba | |
| 370 | 799 | Jul 2015 | Overland Emigrant Trail | State | Nevada | |
| 371 | 294 | Jul 2015 | Rough and Ready | State | Nevada | |
| 372 | 247 | Jul 2015 | First Long-Distance Telephone Line | Other | Nevada | |
| 373 | 390 | Jul 2015 | Bridgeport Covered Bridge | State | Nevada | |
| 374 | 357 | Jul 2015 | Nomi Lackee Indian Reservation | Other | Tehama | |
| 375 | 11 | Jul 2015 | Noble Pass Route | Other | Shasta | |
| 376 | 736 | Jul 2015 | Letts Valley | State | Colusa | |
| 377 | 33 | Jul 2015 | Southern's Stage Station | Other | Shasta | |
| 378 | 78 | Jul 2015 | Clear Creek | Other | Shasta | |
| 379 | 10 | Jul 2015 | Reading Adobe | State | Shasta | |
| 380 | 120 | Jul 2015 | Dersch Homestead | State | Shasta | |
| 381 | 148 | Jul 2015 | Bass Hill | Other | Shasta | |
| 382 | 379 | Jul 2015 | Fort Reading | Other | Shasta | |
| 383 | 116 | Jul 2015 | Battle Rock | State | Shasta | |
| 384 | 396 | Jul 2015 | Strawberry Valley Stage Station | Other | Siskiyou | |
| 385 | 32 | Jul 2015 | Reading's Bar | State | Shasta | |
| 386 | 519 | Jul 2015 | Bell's Bridge | Missing | Shasta | |
| 387 | 58 | Jul 2015 | Old California Oregon Road | Other | Shasta | |
| 388 | 317 | Jul 2015 | Fort Jones Site | Other | Siskiyou | |
| 389 | 517 | Jul 2015 | Emigrant Trail | State | Siskiyou | |
| 390 | 901 | Jul 2015 | Yreka | State | Siskiyou | |
| 391 | 649 | Jul 2015 | Tolowa Indian Village Site | State | Del Norte | |
| 392 | 544 | Jul 2015 | Fort Ter-Wer Site | State | Del Norte | |
| 393 | 645 | Jul 2015 | Pioneer Stage Road to Oregon | State | Del Norte | |
| 394 | 497 | Jul 2015 | S.S. Emidio | State | Del Norte | |
| 395 | 545 | Jul 2015 | Camp Lincoln | State | Del Norte | |
| 396 | 541 | Jul 2015 | Brother Jonathan Cemetery | State | Del Norte | |
| 397 | 951.1 | Jul 2015 | Battery Point Lighthouse | State | Del Norte | |
| 398 | 146 | Jul 2015 | Trinidad Head | Other | Humboldt | |
| 399 | 477 | Jul 2015 | Eureka | State | Humboldt | |
| 400 | 838 | Jul 2015 | Old Indian Village of Tsurai | State | Humboldt | |
| 401 | 154 | Jul 2015 | Fort Humboldt | State | Humboldt | |
| 402 | 216 | Jul 2015 | Trinidad | State | Humboldt | |
| 403 | 783 | Jul 2015 | Jacoby Building | State | Humboldt | |
| 404 | 882 | Jul 2015 | Humboldt Harbor Historical District | State | Humboldt | |
| 405 | 842 | Jul 2015 | Arcata and Mad River Rail Road Company | State | Humboldt | |
| 406 | 173 | Jul 2015 | Centerville Beach Cross | Other | Humboldt | |
| 407 | 543 | Jul 2015 | California's First Drilled Oil Wells | State | Humboldt | |
| 408 | 215 | Jul 2015 | Camp Curtis | State | Humboldt | |
| 409 | 883 | Jul 2015 | Ferndale | State | Humboldt | |
| 410 | 483 | Jul 2015 | Father Rinaldi's Foundation | Other | Shasta | |
| 411 | 164 | Jul 2015 | Old Arrow Tree | Other | Humboldt | |
| 412 | 77 | Jul 2015 | Old Town of Shasta | State | Shasta | |
| 413 | 131 | Jul 2015 | Whiskeytown | None | Shasta | |
| 414 | 377 | Jul 2015 | Pioneer Baby's Grave | State | Shasta | |
| 415 | 166 | Jul 2015 | French Gulch | State | Shasta | |
| 416 | 778 | Jul 2015 | La Grange Mine | State | Trinity | |
| 417 | 484 | Jul 2015 | Georgetown | State | El Dorado | |
| 418 | 1012 | Jul 2015 | Pelton Wheel Manufacturing Site | State | Nevada | |
| 419 | 914 | Jul 2015 | Holbrooke Hotel | State | Nevada | |
| 420 | 855 | Jul 2015 | Mount Saint Mary's Convent and Academy | State | Nevada | |
| 421 | 899 | Jul 2015 | National Exchange Hotel | State | Nevada | |
| 422 | 863 | Jul 2015 | Nevada Theatre | State | Nevada | |
| 423 | 399 | Jul 2015 | Forest Hill | State | Placer | |
| 424 | 629 | Jul 2015 | Omega Hydraulic Diggings | State | Nevada | |
| 425 | 832 | Jul 2015 | South Yuba Canal Office | State | Nevada | |
| 426 | 628 | Jul 2015 | Alpha Hydraulic Diggings | State | Nevada | |
| 427 | 293 | Jul 2015 | Home of Lotta Crabtree | None | Nevada | |
| 428 | 297 | Jul 2015 | Gold Hill Mine | Other | Nevada | |
| 429 | 398 | Jul 2015 | Yankee Jims | State | Placer | |
| 430 | 402 | Jul 2015 | Michigan Bluff | State | Placer | |
| 431 | 298 | Jul 2015 | Empire Mine | Other | Nevada | |
| 432 | 709 | Jul 2015 | Weaverville Joss House | State | Trinity | |
| 433 | 521 | Jul 2015 | Greenwood | State | El Dorado | |
| 434 | 401 | Jul 2015 | Iowa Hill | State | Placer | |
| 435 | 843 | Jul 2015 | North Star Mine Powerhouse | State | Nevada | |
| 436 | 319 | Jul 2015 | Marshall's Blacksmith Shop | None | El Dorado | |
| 437 | 292 | Jul 2015 | Home of Lola Montez | Other | Nevada | |
| 438 | 815 | Jun 2015 | Wakamatsu Tea and Silk Farm Colony | State | El Dorado | |
| 439 | 322 | Jun 2015 | Sutter Creek | Other | Amador | |
| 440 | 551 | Jun 2015 | Grange Hall Site | Missing | El Dorado | |
| 441 | 118 | Jun 2015 | Jackson Gate | None | Amador | |
| 442 | 762 | Jun 2015 | D'Agostini Winery | State | Amador | |
| 443 | 470 | Jun 2015 | Plymouth Trading Post | None | Amador | |
| 444 | 748 | Jun 2015 | Coloma Road-Coloma | State | El Dorado | |
| 445 | 1051.1 | Jun 2015 | Mountain Quarries Railroad Bridge | State | Placer | |
| 446 | 1007 | Jun 2015 | Knight Foundry | State | Amador | |
| 447 | 786 | Jun 2015 | Argonaut and Kennedy Mines | State | Amador | |
| 448 | 865 | Jun 2015 | Pioneer Synagogue Site | State | Amador | |
| 449 | 35 | Jun 2015 | Fiddletown | State | Amador | |
| 450 | 530 | Jun 2015 | Gold Discovery Site | Other | El Dorado | |
| 451 | 31 | Jun 2015 | Drytown | State | Amador | |
| 452 | 143 | Jun 2015 | Marshall's Monument | State | El Dorado | |
| 453 | 34 | Jun 2015 | Pioneer Hall | Other | Amador | |
| 454 | 420 | Jun 2015 | Soulsbyville | State | Tuolumne | |
| 455 | 424 | Jun 2015 | Sawmill Flat | State | Tuolumne | |
| 456 | 506 | Jun 2015 | THE COMMUNITY METHODIST CHURCH OF IONE | State | Amador | |
| 457 | 139 | Jun 2015 | Saint James Episcopal Church | Other | Tuolumne | |
| 458 | 1053 | Jun 2015 | Sierra Railway Shops | State | Tuolumne | |
| 459 | 395 | Jun 2015 | Shaw's Flat | State | Tuolumne | |
| 460 | 281 | Jun 2015 | O'Byrne Ferry | State | Calaveras | |
| 461 | 788 | Jun 2015 | Stewart Store | State | Amador | |
| 462 | 422 | Jun 2015 | Sonora-Mono Road | State | Tuolumne | |
| 463 | 296 | Jun 2015 | Copperopolis | State | Calaveras | |
| 464 | 347 | Jun 2015 | Knights Ferry | State | Stanislaus | |
| 465 | 438 | Jun 2015 | Parrott's Ferry | State | Tuolumne | |
| 466 | 432 | Jun 2015 | Springfield | Other | Tuolumne | |
| 467 | 431 | Jun 2015 | Jamestown | Other | Tuolumne | |
| 468 | 123 | Jun 2015 | Columbia | State | Tuolumne | |
| 469 | 415 | Jun 2015 | Willms Ranch | None | Stanislaus | |
| 470 | 407 | Jun 2015 | Summersville (Tuolumne) | State | Tuolumne | |
| 471 | 460 | Jun 2015 | Second Garrote | State | Tuolumne | |
| 472 | 419 | Jun 2015 | Jacksonville | State | Tuolumne | |
| 473 | 446 | Jun 2015 | Groveland | State | Tuolumne | |
| 474 | 122 | Jun 2015 | Montezuma | Other | Tuolumne | |
| 475 | 406 | Jun 2015 | Big Oak Flat | State | Tuolumne | |
| 476 | 423 | Jun 2015 | Chinese Camp | State | Tuolumne | |
| 477 | 445 | Jun 2015 | Cherokee | Missing | Tuolumne | |
| 478 | 140 | Jun 2015 | Wells Fargo Express Company Building | Other | Tuolumne | |
| 479 | 915 | Jun 2015 | Petrified Forest | State | Sonoma | |
| 480 | 710 | Jun 2015 | Robert Louis Stevenson State Park | Other | Napa | |
| 481 | 1035 | Jun 2015 | Point Arena Light Station | Other | Mendocino | |
| 482 | 927 | Jun 2015 | Temple of Kwan Tai | Other | Mendocino | |
| 483 | 820 | Jun 2015 | Saint Teresa of Avila Church | State | Sonoma | |
| 484 | 5 | Jun 2015 | Fort Ross | State | Sonoma | |
| 485 | 615 | Jun 2015 | Fort Bragg | State | Mendocino | |
| 486 | 529 | Jun 2015 | Angel Island | State | Marin | |
| 487 | 714 | Jun 2015 | Mendocino Presbyterian Church | State | Mendocino | |
| 488 | 833 | Jun 2015 | Bodega Bay and Harbor | State | Sonoma | |
| 489 | 679 | Jun 2015 | Home of Lord Charles Snowden Fairfax (Bird's Nest Glen) | State | Marin | |
| 490 | 222 | Jun 2015 | Olema Lime Kilns | None | Marin | |
| 491 | 552 | Jun 2015 | Pioneer Paper Mill | State | Marin | |
| 492 | 392.1 | Jun 2015 | Haraszthy Villa Site | Other | Sonoma | |
| 493 | 974 | Jun 2015 | Golden Gate Bridge | Other | Marin | |
| 494 | 207 | Jun 2015 | First Sawmill in Marin County | State | Marin | |
| 495 | 917 | Jun 2015 | Green Brae Brick Kiln | State | Marin | |
| 496 | 974.1 | Jun 2015 | Golden Gate Bridge - San Francisco | None | San Francisco | |
| 497 | 999 | Jun 2015 | Marin County Civic Center | State | Marin | |
| 498 | 630 | Jun 2015 | St. Vincent's School for Boys | State | Marin | |
| 499 | 221 | Jun 2015 | Lighter Wharf at Bolinas Site | None | Marin | |
| 500 | 210 | Jun 2015 | Oldest House North of San Francisco Bay, Camillo Ynitia Adobe | None | Marin | |
| 501 | 922 | Jun 2015 | Outdoor Art Club | State | Marin | |
| 502 | 924 | Jun 2015 | China Camp | State | Marin | |
| 503 | 426 | Jun 2015 | Stone And Kelsey Home | State | Lake | |
| 504 | 939.6 | Jun 2015 | Litto's Hubcap Ranch | State | Napa | |
| 505 | 427 | Jun 2015 | Battle Of Bloody Island | State | Lake | |
| 506 | 926 | Jun 2015 | Sun House | State | Mendocino | |
| 507 | 450 | Jun 2015 | Stone House | State | Lake | |
| 508 | 429 | Jun 2015 | Lower Lake Stone Jail | State | Lake | |
| 509 | 683 | Jun 2015 | Hudson Cabin Site | None | Napa | |
| 510 | 467 | Jun 2015 | Old Bull Trail Road and St. Helena Toll Road | State | Lake | |
| 511 | 547 | Jun 2015 | Chiles Mill Site | State | Napa | |
| 512 | 980 | Jun 2015 | Ukiah Vichy Springs Resort | State | Mendocino | |
| 513 | 897 | Jun 2015 | Lake County Courthouse | State | Lake | |
| 514 | 428 | Jun 2015 | Sulphur Bank Mine Site | Missing | Lake | |
| 515 | 549 | Jun 2015 | Frog Woman Rock | None | Mendocino | |
| 516 | 682 | Jun 2015 | York Cabin Site | State | Napa | |
| 517 | 685 | Jun 2015 | Brannan Cottage | Other | Napa | |
| 518 | 684 | Jun 2015 | Brannan Store | Other | Napa | |
| 519 | 563 | Jun 2015 | Charles Krug Winery | State | Napa | |
| 520 | 561 | Jun 2015 | Schramsberg Vineyard | State | Napa | |
| 521 | 814 | Jun 2015 | Beringer Brothers Winery | State | Napa | |
| 522 | 687 | Jun 2015 | Napa Valley Railroad Depot | Other | Napa | |
| 523 | 686 | Jun 2015 | Kelsey House Site | None | Napa | |
| 524 | 359 | Jun 2015 | Old Bale Grist Mill | Other | Napa | |
| 525 | 878 | Jun 2015 | First Presbyterian Church | State | Napa | |
| 526 | 693 | Jun 2015 | Grave of George C. Yount | State | Napa | |
| 527 | 828 | Jun 2015 | Veterans Home of California | State | Napa | |
| 528 | 345 | Jun 2015 | Swift Adobe | Other | Glenn | |
| 529 | 117 | Jun 2015 | Home of Mrs. John Brown | None | Tehama | |
| 530 | 831 | Jun 2015 | Posted Water Notice Site | Other | Glenn | |
| 531 | 564 | Jun 2015 | Yount Blockhouse Site | State | Napa | |
| 532 | 12 | Jun 2015 | Residence of General William B. Ide | State | Tehama | |
| 533 | 329 | Jun 2015 | Rancho Chico and Bidwell Adobe | State | Butte | |
| 534 | 313 | Jun 2015 | Hooker Oak | Other | Butte | |
| 535 | 840.2 | Jun 2015 | Chico Forestry Station and Nursery | State | Butte | |
| 536 | 771 | Jun 2015 | Dogtown Nugget Discovery Site | Other | Butte | |
| 537 | 807 | Jun 2015 | Oregon City | State | Butte | |
| 538 | 183 | Jun 2015 | First Tehama County Courthouse | State | Tehama | |
| 539 | 1043 | Jun 2015 | Mother Orange Tree of Butte County | State | Butte | |
| 540 | 314 | Jun 2015 | Old Suspension Bridge | State | Butte | |
| 541 | 770 | Jun 2015 | Oroville Chinese Temple | State | Butte | |
| 542 | 330 | Jun 2015 | Bidwell's Bar | Other | Butte | |
| 543 | 809 | May 2015 | Last Yahi Indian | State | Butte | |
| 544 | 498 | May 2015 | McKittrick Brea Pit | Other | Kern | |
| 545 | 504 | May 2015 | Buena Vista Refinery | Other | Kern | |
| 546 | 939.9 | May 2015 | Grandma Prisbrey's Bottle Village | State | Ventura | |
| 547 | 979 | May 2015 | Rancho Simi | State | Ventura | |
| 548 | 939.5 | May 2015 | Old Trapper's Lodge | State | Los Angeles | |
| 549 | 659 | May 2015 | Stagecoach Inn | Missing | Ventura | |
| 550 | 904 | May 2015 | Charles Copeland Morse Residence | State | Santa Clara | |
| 551 | 250 | May 2015 | Mission Santa Clara de Asis and Old Spanish Bridge Site | Other | Santa Clara | |
| 552 | 260 | May 2015 | Santa Clara Campaign Treaty Site | State | Santa Clara | |
| 553 | 249 | May 2015 | Old Adobe Woman's Club | State | Santa Clara | |
| 554 | 854 | May 2015 | Old San Jose Post Office | State | Santa Clara | |
| 555 | 945 | May 2015 | First Successful Introduction of the Honeybee to California | State | Santa Clara | |
| 556 | 898 | May 2015 | Roberto-Suñol Adobe | State | Santa Clara | |
| 557 | 461 | May 2015 | State Capitol Site | Other | Santa Clara | |
| 558 | 581 | May 2015 | Well 2-6 | Other | Kern | |
| 559 | 866 | May 2015 | Peralta Adobe | State | Santa Clara | |
| 560 | 1049 | May 2015 | Guadalupe Mission of San Jose | State | Santa Clara | |
| 561 | 417 | May 2015 | Normal School Site | State | Santa Clara | |
| 562 | 433 | May 2015 | El Pueblo De San José De Guadalupe Site | State | Santa Clara | |
| 563 | 434 | May 2015 | City Gardens Site - Nursery of Louis Pellier | Missing | Santa Clara | |
| 564 | 902 | May 2015 | First Unitarian Church Of San Jose | State | Santa Clara | |
| 565 | 910 | May 2015 | Saint Joseph's Roman Catholic Church | Other | Santa Clara | |
| 566 | 952 | May 2015 | Broadcasting Station Site | State | Santa Clara | |
| 567 | 416 | May 2015 | Markham House | Other | Santa Clara | |
| 568 | 376 | May 2015 | California Standard Oil Well 1 | None | Kern | |
| 569 | 339.1 | May 2015 | First Mining in California, Almaden Mine | State | Santa Clara | |
| 570 | 447 | May 2015 | Gubserville | State | Santa Clara | |
| 571 | 435 | May 2015 | Saratoga | State | Santa Clara | |
| 572 | 505 | May 2015 | Almaden Vineyards | State | Santa Clara | |
| 573 | 644 | May 2015 | Murphy Estate Site | State | Santa Clara | |
| 574 | 733 | May 2015 | Paul Masson Mountain Winery | State | Santa Clara | |
| 575 | 339 | May 2015 | New Almaden Quicksilver Mine | State | Santa Clara | |
| 576 | 813 | May 2015 | Montgomery Hill | State | Santa Clara | |
| 577 | 888 | May 2015 | Hayes Mansion | State | Santa Clara | |
| 578 | 800 | May 2015 | Arroyo De San Joseph Cupertino | State | Santa Clara | |
| 579 | 489 | May 2015 | Moreland School | State | Santa Clara | |
| 580 | 458 | May 2015 | Forbes Flour Mill | State | Santa Clara | |
| 581 | 903 | May 2015 | Kotani-En | State | Santa Clara | |
| 582 | 868 | May 2015 | Winchester House | State | Santa Clara | |
| 583 | 931 | May 2015 | Lodi Arch | State | San Joaquin | |
| 584 | 755 | May 2015 | Corral Hollow | None | San Joaquin | |
| 585 | 163 | May 2015 | Wood's Ferry and Wood's Bridge Site | None | San Joaquin | |
| 586 | 520 | May 2015 | San Joaquin Valley College Site | State | San Joaquin | |
| 587 | 740 | May 2015 | Carnegie | State | San Joaquin | |
| 588 | 358 | May 2015 | Woodbridge | None | San Joaquin | |
| 589 | 24 | May 2015 | Portolá Camp: October 31 | State | San Mateo | |
| 590 | 262 | May 2015 | Milton | Other | Calaveras | |
| 591 | 251 | May 2015 | Valley Springs | Other | Calaveras | |
| 592 | 365 | May 2015 | Lockeford (Locke's Ford) | Other | San Joaquin | |
| 593 | 155 | May 2015 | Lone Star Mill | Other | San Joaquin | |
| 594 | 257 | May 2015 | Campo Seco | State | Calaveras | |
| 595 | 263 | May 2015 | Stone Corral | None | Calaveras | |
| 596 | 264 | May 2015 | Double Springs | State | Calaveras | |
| 597 | 266 | May 2015 | Jenny Lind | Other | Calaveras | |
| 598 | 26 | May 2015 | Portolá Camp: October 24-26 | Missing | San Mateo | |
| 599 | 25 | May 2015 | Portolá Camp: October 30 | None | San Mateo | |
| 600 | 254 | May 2015 | Camanche | State | Calaveras | |
