| 301 | 939 | Jul 2014 | Possum Trot | None | San Bernadino | |
| 302 | 539 | Apr 2015 | Posey Station | Missing | Kern | |
| 303 | 119 | Sep 2015 | Portsmouth Plaza | Other | San Francisco | |
| 304 | 665 | Mar 2016 | Portolá Trail Campsite 2 | State | Los Angeles | |
| 305 | 655 | Mar 2016 | Portolá Trail Campsite | State | Los Angeles | |
| 306 | 2 | Jan 2015 | Portolá Journey's End | State | San Mateo | |
| 307 | 727 | Jan 2015 | Portolá Expedition | Other | Ventura | |
| 308 | 24 | May 2015 | Portolá Camp: October 31 | State | San Mateo | |
| 309 | 25 | May 2015 | Portolá Camp: October 30 | None | San Mateo | |
| 310 | 21 | Apr 2015 | Portolá Camp: October 28-29 | None | San Mateo | |
| 311 | 22 | Apr 2015 | Portolá Camp: October 27 | None | San Mateo | |
| 312 | 26 | May 2015 | Portolá Camp: October 24-26 | Missing | San Mateo | |
| 313 | 23 | Oct 2015 | Portolá Camp: October 23 | None | San Mateo | |
| 314 | 94 | Apr 2015 | Portolá Camp: November 5 | None | San Mateo | |
| 315 | 27 | Apr 2015 | Portolá Camp: November 4 | State | San Mateo | |
| 316 | 92 | Apr 2015 | Portolá Camp: November 11, Pulgas Water Temple | None | San Mateo | |
| 317 | 881 | Apr 2016 | Port of Los Angeles Long Wharf | State | Los Angeles | |
| 318 | 708 | Apr 2015 | Pony Express: Yank's Station | State | El Dorado | |
| 319 | 706 | Apr 2015 | Pony Express: Webster's Sugar Loaf House | State | El Dorado | |
| 320 | 707 | Apr 2015 | Pony Express: Strawberry Valley House | State | El Dorado | |
| 321 | 704 | Apr 2015 | Pony Express: Sportsman's Hall | State | El Dorado | |
| 322 | 696 | Sep 2015 | Pony Express Site | State | San Francisco | |
| 323 | 702 | Mar 2015 | Pony Express Route | State | Sacramento | |
| 324 | 805 | May 2015 | Pony Express Remount Station (Woodford Station) | State | Alpine | |
| 325 | 703 | Mar 2015 | Pony Express: Pleasant Grove House | State | El Dorado | |
| 326 | 701 | Mar 2015 | Pony Express: Placerville | State | El Dorado | |
| 327 | 699 | Mar 2015 | Pony Express: Mormon Tavern | State | El Dorado | |
| 328 | 705 | Apr 2015 | Pony Express: Moores (Riverton) | State | El Dorado | |
| 329 | 728 | Apr 2015 | Pony Express: Friday's Station | Other | El Dorado | |
| 330 | 697 | Jul 2014 | Pony Express Five Mile House | State | Sacramento | |
| 331 | 698 | Jul 2014 | Pony Express Fifteen Mile House | State | Sacramento | |
| 332 | 700 | Mar 2015 | Pony Express: El Dorado Nevada House (Mud Springs) | State | El Dorado | |
| 333 | 514 | Sep 2014 | Pomona Water Powerplant | Missing | Los Angeles | |
| 334 | 951.2 | Oct 2016 | Point Sur Light Station | State | Monterey | |
| 335 | 965 | May 2014 | Point Dume | State | Los Angeles | |
| 336 | 1035 | Jun 2015 | Point Arena Light Station | Other | Mendocino | |
| 337 | 470 | Jun 2015 | Plymouth Trading Post | None | Amador | |
| 338 | 695 | Oct 2015 | Plum Valley House | State | Sierra | |
| 339 | 160 | Jan 2015 | Plummer House, Oldest House in Hollywood | Other | Los Angeles | |
| 340 | 480 | Oct 2015 | Plumas House Site | None | Plumas | |
| 341 | 180 | Nov 2014 | Plaza Hotel | State | San Benito | |
| 342 | 845 | Jul 2016 | Plank Road | State | Imperial | |
| 343 | 475 | Mar 2015 | Placerville- Dry Diggins- Old Hangtown | State | El Dorado | |
| 344 | 366 | Mar 2015 | Pioneer Telegraph Station | None | Sacramento | |
| 345 | 865 | Jun 2015 | Pioneer Synagogue Site | State | Amador | |
| 346 | 645 | Jul 2015 | Pioneer Stage Road to Oregon | State | Del Norte | |
| 347 | 724 | May 2015 | Pioneer Ski Area of America, Squaw Valley | State | Placer | |
| 348 | 625 | Oct 2015 | Pioneer School House | Other | Plumas | |
| 349 | 552 | Jun 2015 | Pioneer Paper Mill | State | Marin | |
| 350 | 172 | May 2014 | Pioneer Oil Refinery | State | Los Angeles | |
| 351 | 378 | Apr 2015 | Pioneer Odd Fellows | Other | Alpine | |
| 352 | 201 | Apr 2016 | Pioneer House of the Mother Colony | State | Orange | |
| 353 | 34 | Jun 2015 | Pioneer Hall | Other | Amador | |
| 354 | 212 | Oct 2015 | Pioneer Grave | Other | Plumas | |
| 355 | 612 | Jul 2014 | Pioneer Firehouse Site | None | Sacramento | |
| 356 | 585 | Mar 2015 | Pioneer Express Trail | State | Placer | |
| 357 | 836 | Jan 2015 | Pioneer Electronics Research Laboratory | State | Santa Clara | |
| 358 | 271 | Aug 2015 | Pioneer Cemetery | None | Calaveras | |
| 359 | 377 | Jul 2015 | Pioneer Baby's Grave | State | Shasta | |
| 360 | 930 | Oct 2015 | Pigeon Point Lighthouse | State | San Mateo | |
| 361 | 986 | Jul 2014 | Piedmont Way | State | Alameda | |
| 362 | 159 | Mar 2016 | Pico House | Other | Los Angeles | |
| 363 | 193 | Jul 2016 | Picacho Mines | State | Imperial | |
| 364 | 915 | Jun 2015 | Petrified Forest | State | Sonoma | |
| 365 | 466 | Aug 2015 | Peter L. Traver Building | State | Calaveras | |
| 366 | 18 | Apr 2014 | Petaluma Adobe | State | Sonoma | |
| 367 | 285 | Jan 2015 | Peralta (Ygnacio) House | State | Alameda | |
| 368 | 925 | Jan 2015 | Peralta (Antonio) Hacienda | Other | Alameda | |
| 369 | 866 | May 2015 | Peralta Adobe | State | Santa Clara | |
| 370 | 534 | May 2014 | Peña Adobe | State | Solano | |
| 371 | 1012 | Jul 2015 | Pelton Wheel Manufacturing Site | State | Nevada | |
| 372 | 750 | Oct 2016 | Peg Leg Smith Monument | State | San Diego | |
| 373 | 858 | Jun 2016 | Pedro Fages Trail | State | San Diego | |
| 374 | 733 | May 2015 | Paul Masson Mountain Winery | State | Santa Clara | |
| 375 | 448 | Sep 2015 | Patchen | State | Santa Clara | |
| 376 | 887 | Dec 2014 | Pasadena Playhouse | State | Los Angeles | |
| 377 | 438 | Jun 2015 | Parrott's Ferry | State | Tuolumne | |
| 378 | 89 | Sep 2015 | Parrott Granite Block Site | None | San Francisco | |
| 379 | 20 | Aug 2015 | Parent Washington Navel Orange Tree | Other | Riverside | |
| 380 | 1027 | Jul 2014 | Pardee Home | Other | Alameda | |
| 381 | 884 | Jul 2014 | Paramount Theatre | State | Alameda | |
| 382 | 681 | Apr 2016 | Paradox Hybrid Walnut Tree | Other | Los Angeles | |
| 383 | 295 | Aug 2015 | Paloma | State | Calaveras | |
| 384 | 639 | Oct 2016 | Palm Springs | State | San Diego | |
| 385 | 190 | May 2016 | Painted Rock | None | Riverside | |
| 386 | 988 | Dec 2014 | Pacific Asia Museum | State | Los Angeles | |
| 387 | 829 | Jun 2014 | Pacheco Pass | State | Merced | |
| 388 | 515 | May 2017 | Pacheco (Don Salvio) Adobe | Other | Contra Costa | |
| 389 | 455 | May 2014 | Pacheco (Don Fernando) Adobe | Other | Contra Costa | |
| 390 | 230 | Aug 2014 | Owensville | Other | Inyo | |
| 391 | 752 | Apr 2015 | Owens Lake Silver-Lead Furnace | State | Inyo | |
| 392 | 610 | Mar 2015 | Overton Building | None | Sacramento | |
| 393 | 799.3 | Mar 2015 | Overland Emigrant Trail - Yuba | State | Yuba | |
| 394 | 799.2 | May 2015 | Overland Emigrant Trail - Placer | State | Placer | |
| 395 | 799 | Jul 2015 | Overland Emigrant Trail | State | Nevada | |
| 396 | 922 | Jun 2015 | Outdoor Art Club | State | Marin | |
| 397 | 909 | Apr 2015 | Our Lady of the Wayside | State | San Mateo | |
| 398 | 451 | Apr 2016 | Ortega-Vigare Adobe | State | Los Angeles | |
| 399 | 770 | Jun 2015 | Oroville Chinese Temple | State | Butte | |
| 400 | 608 | Mar 2015 | Orleans Hotel Site | None | Sacramento | |
| 401 | 772 | Sep 2015 | Original Site of Saint Mary's College Site | State | San Francisco | |
| 402 | 928 | Apr 2015 | Original Mission La Purísima (La Purisima) | State | Santa Barbara | |
| 403 | 536 | Mar 2016 | Original building of the University of Southern California | State | Los Angeles | |
| 404 | 807 | Jun 2015 | Oregon City | State | Butte | |
| 405 | 463 | Aug 2014 | Ophir | State | Placer | |
| 406 | 629 | Jul 2015 | Omega Hydraulic Diggings | State | Nevada | |
| 407 | 115 | Aug 2014 | Olivas Adobe | State | Ventura | |
| 408 | 918 | Apr 2016 | Olinda | State | Orange | |
| 409 | 222 | Jun 2015 | Olema Lime Kilns | None | Marin | |
| 410 | 381 | Apr 2016 | Old Whaling Station | Other | Los Angeles | |
| 411 | 875 | Mar 2017 | Old United States Mint | State | San Francisco | |
| 412 | 939.5 | May 2015 | Old Trapper's Lodge | State | Los Angeles | |
| 413 | 830 | Sep 2014 | Old Town San Diego | State | San Diego | |
| 414 | 77 | Jul 2015 | Old Town of Shasta | State | Shasta | |
| 415 | 1004 | Apr 2016 | Old Town Irvine | Other | Orange | |
| 416 | 638 | May 2016 | Old Temescal Road | State | Riverside | |
| 417 | 314 | Jun 2015 | Old Suspension Bridge | State | Butte | |
| 418 | 826 | Nov 2015 | Old Stovepipe Wells | State | Inyo | |
| 419 | 343 | Oct 2015 | Old Store at La Honda | Other | San Mateo | |
| 420 | 632 | Jan 2016 | Old Short Cut | None | Los Angeles | |
| 421 | 840 | Apr 2016 | Old Santa Monica Forestry Station | State | Los Angeles | |
| 422 | 204 | Apr 2016 | Old Santa Ana | State | Orange | |
| 423 | 854 | May 2015 | Old San Jose Post Office | State | Santa Clara | |
| 424 | 373 | Apr 2016 | Old Salt Lake | Other | Los Angeles | |
| 425 | 810 | Sep 2015 | Old Saint Mary’s Church | State | San Francisco | |
| 426 | 812 | Mar 2015 | Old Sacramento | State | Sacramento | |
| 427 | 51 | Sep 2014 | Old Point Loma Lighthouse | State | San Diego | |
| 428 | 730 | Mar 2016 | Old Plaza Firehouse | State | Los Angeles | |
| 429 | 354 | Nov 2014 | Old Pacific House | None | Monterey | |
| 430 | 837 | Apr 2014 | Old Orange County Courthouse | State | Orange | |
| 431 | 114 | Aug 2014 | Old Mission Reservoir | Other | Ventura | |
| 432 | 465 | Aug 2015 | Old Mining Camp of Brownsville | State | Calaveras | |
| 433 | 302 | Dec 2014 | Old Mill | Other | Los Angeles | |
| 434 | 729 | Jun 2016 | Old Maizeland School | State | Orange | |
| 435 | 361 | Apr 2015 | Old Lobero Theatre | Missing | Santa Barbara | |
| 436 | 61 | Sep 2014 | Old La Playa | State | San Diego | |
| 437 | 198 | Apr 2016 | Old Landing | Missing | Orange | |
| 438 | 838 | Jul 2015 | Old Indian Village of Tsurai | State | Humboldt | |
| 439 | 731 | May 2014 | Old Homestead | State | Contra Costa | |
| 440 | 210 | Jun 2015 | Oldest House North of San Francisco Bay, Camillo Ynitia Adobe | None | Marin | |
| 441 | 111 | Oct 2015 | Old Emigrant Trail | Other | Modoc | |
| 442 | 662 | Apr 2015 | Old Emigrant Road, Silver Lake | State | Amador | |
| 443 | 661 | Apr 2015 | Old Emigrant Road | State | Alpine | |
| 444 | 1 | Mar 2014 | Old Custom House | State | Monterey | |
| 445 | 58 | Jul 2015 | Old California Oregon Road | Other | Shasta | |
| 446 | 467 | Jun 2015 | Old Bull Trail Road and St. Helena Toll Road | State | Lake | |
| 447 | 725 | Jul 2016 | Old Bear Valley Dam | State | San Bernadino | |
| 448 | 359 | Jun 2015 | Old Bale Grist Mill | Other | Napa | |
| 449 | 164 | Jul 2015 | Old Arrow Tree | Other | Humboldt | |
| 450 | 249 | May 2015 | Old Adobe Woman's Club | State | Santa Clara | |
| 451 | 85 | Sep 2015 | Office of the California Star Newspaper Site | Other | San Francisco | |
| 452 | 281 | Jun 2015 | O'Byrne Ferry | State | Calaveras | |
| 453 | 168 | May 2014 | Oak of the Golden Dream | State | Los Angeles | |
| 454 | 502 | Jun 2016 | Oak Grove Butterfield Stage Station | State | San Diego | |
| 455 | 97 | Jan 2015 | Oak Creek Pass | State | Kern | |
| 456 | 144 | Mar 2016 | Nuestra Señora Reina de los Angeles | Other | Los Angeles | |
| 457 | 843 | Jul 2015 | North Star Mine Powerhouse | State | Nevada | |
| 458 | 112 | Apr 2016 | North gate of city of Anaheim | Other | Orange | |
| 459 | 852 | Jul 2015 | North Bloomfield Mining and Gravel Company | State | Nevada | |
| 460 | 417 | May 2015 | Normal School Site | State | Santa Clara | |
| 461 | 357 | Jul 2015 | Nomi Lackee Indian Reservation | Other | Tehama | |
| 462 | 677 | Oct 2015 | Nobles Emigrant Trail (Viewland) | State | Lassen | |
| 463 | 675 | Oct 2015 | Nobles Emigrant Trail (Susanville) | State | Lassen | |
| 464 | 11 | Jul 2015 | Noble Pass Route | Other | Shasta | |
| 465 | 939.7 | Apr 2015 | Nitt Witt Ridge | State | San Luis Obispo | |
| 466 | 900 | Jul 2014 | Nisipowinan Village Site | None | Sacramento | |
| 467 | 88 | Sep 2015 | Niantic Storeship Site | Other | San Francisco | |
| 468 | 324 | Nov 2014 | New Idria Mine | State | San Benito | |
| 469 | 436 | Oct 2014 | New Hope | State | San Joaquin | |
| 470 | 592 | Jul 2014 | New Helvetia Cemetery | Other | Sacramento | |
| 471 | 339 | May 2015 | New Almaden Quicksilver Mine | State | Santa Clara | |
| 472 | 863 | Jul 2015 | Nevada Theatre | State | Nevada | |
| 473 | 570 | Mar 2015 | Negro Hill | Missing | El Dorado | |
| 474 | 972 | Mar 2016 | Naval and Marine Corps Reserve Center | State | Los Angeles | |
| 475 | 781 | Oct 2014 | National Old Trails Monument | State | San Bernadino | |
| 476 | 899 | Jul 2015 | National Exchange Hotel | State | Nevada | |
| 477 | 667 | Apr 2014 | Nash Adobe | State | Sonoma | |
| 478 | 687 | Jun 2015 | Napa Valley Railroad Depot | Other | Napa | |
| 479 | 834 | Jan 2015 | Muybridge and the Development of Motion Pictures Site | State | Santa Clara | |
| 480 | 245 | Jul 2014 | Mussel Slough Tragedy | State | Kings | |
| 481 | 680 | Jul 2014 | Murphy's Ranch | State | Sacramento | |
| 482 | 275 | Aug 2015 | Murphys | Other | Calaveras | |
| 483 | 644 | May 2015 | Murphy Estate Site | State | Santa Clara | |
| 484 | 452 | Jun 2016 | Mule Hill | State | San Diego | |
| 485 | 312 | Aug 2016 | Muir National Historic Site | State | Contra Costa | |
| 486 | 855 | Jul 2015 | Mount Saint Mary's Convent and Academy | State | Nevada | |
| 487 | 932 | Jul 2014 | Mount Diablo Coal Field | State | Contra Costa | |
| 488 | 905 | Jul 2014 | Mount Diablo | State | Contra Costa | |
| 489 | 194 | Jul 2016 | Mountain Springs Station | State | Imperial | |
| 490 | 1051 | Jul 2015 | Mountain Quarries Railroad Bridge | State | El Dorado | |
| 491 | 1051.1 | Jun 2015 | Mountain Quarries Railroad Bridge | State | Placer | |
| 492 | 589 | Apr 2015 | Mountain House Station | State | Kern | |
| 493 | 1043 | Jun 2015 | Mother Orange Tree of Butte County | State | Butte | |
| 494 | 821 | Apr 2015 | Morro Rock | State | San Luis Obispo | |
| 495 | 577 | Oct 2014 | Mormon Trail Monument | Other | San Bernadino | |
| 496 | 44 | Jul 2016 | Mormon Stockade | Other | San Bernadino | |
| 497 | 96 | Jul 2016 | Mormon Road | Other | San Bernadino | |
| 498 | 569 | Mar 2015 | Mormon Island | Other | El Dorado | |
| 499 | 323 | Apr 2015 | Mormon Bar | Other | Mariposa | |
| 500 | 489 | May 2015 | Moreland School | State | Santa Clara | |
| 501 | 509 | Jul 2014 | Moraga Adobe | None | Contra Costa | |
| 502 | 711 | Feb 2015 | Montgomery Memorial | Other | San Diego | |
| 503 | 81 | Sep 2015 | Montgomery Landing Place | Other | San Francisco | |
| 504 | 813 | May 2015 | Montgomery Hill | State | Santa Clara | |
| 505 | 80 | Sep 2015 | Montgomery Block Site | State | San Francisco | |
| 506 | 122 | Jun 2015 | Montezuma | Other | Tuolumne | |
| 507 | 256 | Aug 2015 | Mokelumne Hill IOOF Hall | None | Calaveras | |
| 508 | 261 | Aug 2015 | Mokelumne Hill Congregational Church | None | Calaveras | |
| 509 | 269 | Aug 2015 | Mokelumne Hill | Other | Calaveras | |
| 510 | 162 | Jul 2014 | Mokelumne City Site | Missing | San Joaquin | |
| 511 | 963.2 | Nov 2015 | Mojave Road - San Bernadino | State | San Bernadino | |
| 512 | 963 | Apr 2016 | Mojave Road | None | Los Angeles | |
| 513 | 652 | Nov 2015 | Mojave 20-Mule Team Borax Terminus | State | Kern | |
| 514 | 205 | Apr 2016 | Modjeska House | State | Orange | |
| 515 | 267 | Aug 2015 | Mitchler Hotel (Murphy's Hotel) | State | Calaveras | |
| 516 | 161 | Oct 2014 | Mission Vieja | Other | Los Angeles | |
| 517 | 305 | Mar 2014 | Mission Santa Inés | None | Santa Barbara | |
| 518 | 342 | Mar 2014 | Mission Santa Cruz Site | State | Santa Cruz | |
| 519 | 250 | May 2015 | Mission Santa Clara de Asis and Old Spanish Bridge Site | Other | Santa Clara | |
| 520 | 338 | Mar 2014 | Mission Santa Clara | State | Santa Clara | |
| 521 | 309 | Mar 2014 | Mission Santa Barbara | State | Santa Barbara | |
| 522 | 220 | Apr 2014 | Mission San Rafael Arcángel | State | Marin | |
| 523 | 921 | Jul 2016 | Mission San Pedro y San Pablo de Bicuner | State | Imperial | |
| 524 | 326 | Mar 2014 | Mission San Miguel Arcángel | State | San Luis Obispo | |
| 525 | 239 | Feb 2014 | Mission San Luís Rey de Francia | State | San Diego | |
| 526 | 325 | Mar 2014 | Mission San Luis Obispo de Tolosa | State | San Luis Obispo | |
| 527 | 200 | Feb 2014 | Mission San Juan Capistrano | State | Orange | |
| 528 | 195 | Mar 2014 | Mission San Juan Bautista | Other | San Benito | |
| 529 | 334 | Mar 2014 | Mission San Jose | State | Alameda | |
| 530 | 158 | Mar 2014 | Mission San Gabriel Arcángel | Other | Los Angeles | |
| 531 | 3 | Apr 2014 | Mission San Francisco Solano | State | Sonoma | |
| 532 | 327 | Apr 2014 | Mission San Francisco de Asís (Mission Dolores) | Other | San Francisco | |
| 533 | 157 | Mar 2014 | Mission San Fernando Rey de España | Other | Los Angeles | |
| 534 | 242 | Feb 2014 | Mission San Diego de Alcala | State | San Diego | |
| 535 | 135 | Mar 2014 | Mission San Carlos Borromeo de Carmelo | None | Monterey | |
| 536 | 310 | Mar 2014 | Mission San Buenaventura | Other | Ventura | |
| 537 | 232 | Mar 2014 | Mission San Antonio de Padua | State | Monterey | |
| 538 | 233 | Mar 2014 | Mission Nuestra Señora de la Soledad | State | Monterey | |
| 539 | 350 | Jul 2016 | Mission La Purísima Concepción Site | State | Imperial | |
| 540 | 340 | Mar 2014 | Mission La Purísima | State | Santa Barbara | |
| 541 | 761 | Aug 2015 | Mission Inn | State | Riverside | |
| 542 | 327.1 | Sep 2015 | Mission Dolores Lagoon Site | State | San Francisco | |
| 543 | 52 | Mar 2016 | Mission Dam and Flume | State | San Diego | |
| 544 | 744 | Mar 2016 | Mirror Building | Other | Los Angeles | |
| 545 | 262 | May 2015 | Milton | Other | Calaveras | |
| 546 | 849 | Jan 2015 | Mills Hall | None | Alameda | |
| 547 | 609 | Mar 2015 | Mills Bank Building | None | Sacramento | |
| 548 | 43 | Jun 2014 | Mill Creek Zanja | Missing | San Bernadino | |
| 549 | 36 | Aug 2015 | Middle Bar | None | Amador | |
| 550 | 402 | Jul 2015 | Michigan Bluff | State | Placer | |
| 551 | 468 | Jul 2016 | Michigan Bar | Other | Sacramento | |
| 552 | 767 | Mar 2015 | Methodist Episcopal Church | Other | El Dorado | |
| 553 | 171 | Mar 2016 | Merced Theatre | Other | Los Angeles | |
| 554 | 516.2 | Nov 2015 | Mentryville | State | Los Angeles | |
| 555 | 714 | Jun 2015 | Mendocino Presbyterian Church | State | Mendocino | |
| 556 | 459 | Sep 2015 | Mellus and Howard Site | None | San Francisco | |
| 557 | 939.2 | May 2014 | Medica Gardens | State | Sonoma | |
| 558 | 498 | May 2015 | McKittrick Brea Pit | Other | Kern | |
| 559 | 794 | Apr 2016 | McFadden Wharf | State | Orange | |
| 560 | 211 | Aug 2014 | Mayfield Canyon Battleground | None | Inyo | |
| 561 | 511 | Aug 2016 | Martínez Adobe (Martinez Adobe) | State | Contra Costa | |
| 562 | 722 | May 2014 | Marsh Murder Site | State | Contra Costa | |
| 563 | 143 | Jun 2015 | Marshall's Monument | State | El Dorado | |
| 564 | 319 | Jul 2015 | Marshall's Blacksmith Shop | None | El Dorado | |
| 565 | 138 | Aug 2015 | Mark Twain Cabin Historic Markers | State | Tuolumne | |
| 566 | 240 | May 2015 | Marklee's Cabin Site | None | Alpine | |
| 567 | 754 | Sep 2015 | Mark Hopkins Institute of Art Site | State | San Francisco | |
| 568 | 416 | May 2015 | Markham House | Other | Santa Clara | |
| 569 | 670 | Apr 2015 | Mariposa County Courthouse | State | Mariposa | |
| 570 | 999 | Jun 2015 | Marin County Civic Center | State | Marin | |
| 571 | 751 | May 2014 | Mare Island Commemorative Plaque- First U.S. Naval Station in the Pacific | State | Solano | |
| 572 | 850 | Aug 2014 | Manzanar Relocation Center | State | Inyo | |
| 573 | 1018 | Apr 2016 | Manhattan Beach Pier | State | Los Angeles | |
| 574 | 28 | Apr 2015 | Maiden's Grave | Other | Amador | |
| 575 | 1028 | Sep 2014 | Madonna of the Trail | Other | San Bernadino | |
| 576 | 688 | Nov 2015 | Lyons Station Stagecoach Stop | State | Los Angeles | |
| 577 | 531 | Mar 2016 | Lummis Home | Other | Los Angeles | |
| 578 | 301 | Mar 2016 | Lugo Adobe | None | Los Angeles | |
| 579 | 429 | Jun 2015 | Lower Lake Stone Jail | State | Lake | |
| 580 | 913 | Jan 2015 | Lou Henry Hoover House | State | Santa Clara | |
| 581 | 635 | Oct 2016 | Los Puertecitos | State | San Diego | |
| 582 | 689 | Nov 2015 | Los Encinos State Historic Park | Other | Los Angeles | |
| 583 | 550 | Jul 2014 | Los Banos | State | Merced | |
| 584 | 156 | Mar 2016 | Los Angeles Plaza | State | Los Angeles | |
| 585 | 960 | Mar 2016 | Los Angeles Memorial Coliseum | State | Los Angeles | |
| 586 | 328 | Sep 2015 | Long Wharf Site | None | San Francisco | |
| 587 | 1014 | Mar 2016 | Long Beach Marine Stadium | State | Los Angeles | |
| 588 | 155 | May 2015 | Lone Star Mill | Other | San Joaquin | |
| 589 | 931 | May 2015 | Lodi Arch | State | San Joaquin | |
| 590 | 555 | Oct 2015 | Lockhart Ferry | State | Shasta | |
| 591 | 365 | May 2015 | Lockeford (Locke's Ford) | Other | San Joaquin | |
| 592 | 933 | Jan 2015 | Llano Del Rio | Missing | Los Angeles | |
| 593 | 241 | Jul 2014 | Livermore Memorial Monument | Other | Alameda | |
| 594 | 939.6 | Jun 2015 | Litto's Hubcap Ranch | State | Napa | |
| 595 | 221 | Jun 2015 | Lighter Wharf at Bolinas Site | None | Marin | |
| 596 | 1021 | Apr 2016 | Liberty Hill Site | State | Los Angeles | |
| 597 | 937 | Sep 2015 | Liberty Bell Slot Machine Site | State | San Francisco | |
| 598 | 736 | Jul 2015 | Letts Valley | State | Colusa | |
| 599 | 642 | Jan 2015 | Leland Stanford Winery | State | Alameda | |
| 600 | 953 | Aug 2014 | Laws Narrow Gauge Railroad Station | State | Inyo | |
