Alternative Education-San Joaquin High School had the most sixth-grade students enrolled in California with 1,188.
According to the National Center for Education Services, California is expected to see public and secondary school enrollment decrease three percent from 2017-2029. The state expected to see the largest drop in enrollment is New Mexico with a projected 12 percent decrease, while Washington D.C. is expected to see a 14 percent increase over the same time period.
In a survey conducted by the Public Policy Institute of California, seven percent of respondents said large class sizes was the biggest issue facing California's K-12 schools. In the same survey, 50 percent of the respondents said they did not view the financial resources their local public school was getting as adequate.
| Rank | School | Attendance |
|---|---|---|
| 1 | Alternative Education-San Joaquin High School | 1,188 |
| 2 | Alfred B. Nobel Charter Middle School | 728 |
| 3 | George Ellery Hale Charter Academy | 674 |
| 4 | River Springs Charter School | 660 |
| 5 | Thomas Starr King Middle School Film and Media Magnet | 657 |
| 6 | Paul Revere Charter Middle School | 642 |
| 7 | Inspire Charter School - Kern | 613 |
| 8 | Gaspar De Portola Middle School | 550 |
| 9 | Eleanor Murray Fallon School | 546 |
| 10 | Robert A. Millikan Affiliated Charter & Performing Arts Magnet Middle School | 540 |
| 10 | Culver City Middle School | 540 |
| 12 | John M. Horner Junior High School | 536 |
| 13 | Oak Valley Middle School | 523 |
| 14 | Walter Reed Middle School | 522 |
| 15 | Richard Henry Dana Middle School | 520 |
| 16 | James Madison Middle School | 507 |
| 17 | Rudecinda Sepulveda Dodson Middle School | 505 |
| 18 | Stephen M. White Middle School | 502 |
| 19 | Thompson Middle School | 494 |
| 19 | South Gate Middle School | 494 |
| 21 | John Burroughs Middle School | 490 |
| 22 | Robert Frost Middle School | 489 |
| 23 | Gonzalo Felicitas Mendez Fundamental Intermediate | 485 |
| 24 | Wilmington Middle Science Technology Engineering Arts Mathematics (STEAM) Magnet | 476 |
| 25 | Bernardo Heights Middle School | 475 |
| 26 | Hillsdale Middle School | 469 |
| 26 | San Elijo Middle School | 469 |
| 28 | Hughes Middle School | 468 |
| 28 | San Gorgonio Middle School | 468 |
| 30 | William G. Jehue Middle School | 461 |
| 31 | John Muir Middle School | 455 |
| 31 | E.O. Green Junior High School | 455 |
| 33 | Sutter Middle School | 452 |
| 34 | Marshall Middle School | 446 |
| 35 | Ethan A. Chase Middle School | 445 |
| 36 | Chester W. Nimitz Middle School | 444 |
| 37 | Cope Middle School | 443 |
| 38 | Lennox Middle School | 440 |
| 39 | Dorothy McElhinney Middle School | 439 |
| 40 | Palm Desert Charter Middle School | 438 |
| 41 | Douglas MacArthur Fundamental Intermediate | 437 |
| 42 | Canyon Middle School | 435 |
| 43 | Gordon Griffiths Middle School | 434 |
| 44 | Ramona Middle School | 433 |
| 45 | Ysmael Villegas Middle School | 430 |
| 45 | Shivela Middle School | 430 |
| 47 | Palms Middle School | 426 |
| 47 | Bella Vista Middle School | 426 |
| 49 | Ladera Ranch Middle School | 423 |
| 50 | Barbara Chilton Middle School | 421 |
| 51 | Wendy Lopour Doty Middle School | 419 |
| 52 | Highlands Elementary School | 417 |
| 53 | Manhattan Beach Middle School | 416 |
| 54 | Etiwanda Intermediate | 415 |
| 55 | Menifee Valley Middle School | 414 |
| 56 | Richard E. Byrd Middle School | 411 |
| 57 | Wayne Ruble Middle School | 409 |
| 58 | Raymond A. Villa Fundamental Intermediate | 408 |
| 59 | Vista Heights Middle School | 407 |
| 59 | Ralston Intermediate | 407 |
| 61 | George K. Porter Middle School | 402 |
| 62 | Stanford Middle School | 401 |
| 63 | Ernest Lawrence Middle School | 400 |
| 64 | Heritage Intermediate | 399 |
| 65 | Clement Middle School | 398 |
| 66 | A.P. Giannini Middle School | 397 |
| 67 | Mary R. Stauffer Middle School | 395 |
| 67 | Visions In Education | 395 |
| 69 | Gerald P. Carr Intermediate | 394 |
| 69 | McKee Middle School | 394 |
| 71 | Woodland Park Middle School | 389 |
| 71 | Vista Middle School | 389 |
| 73 | Folsom Middle School | 388 |
| 73 | Meadowbrook Middle School | 388 |
| 75 | Thomas S. Hart Middle School | 387 |
| 75 | Franklin Classical Middle School | 387 |
| 77 | Mountain View Middle School | 386 |
| 78 | Martin Luther King Jr. Middle School | 385 |
| 78 | Willow Glen Middle School | 385 |
| 80 | William B. Bristow Middle School | 383 |
| 81 | Balboa Middle School | 382 |
| 82 | Bell Mountain Middle School | 381 |
| 82 | Griffith Middle School | 381 |
| 82 | Heartland Charter School | 381 |
| 85 | Marco Forster Middle School | 380 |
| 86 | Itliong-Vera Cruz Middle School | 379 |
| 87 | Day Creek Intermediate | 378 |
| 88 | Harvest Park Middle School | 376 |
| 88 | Joaquin Miller Middle School | 376 |
| 88 | Nick G. Parras Middle School | 376 |
| 88 | Los Alisos Middle School | 376 |
| 92 | Twin Peaks Middle School | 375 |
| 92 | Granada Middle School | 375 |
| 94 | R.J. Frank Academy of Marine Science & Engineering | 374 |
| 95 | James B. Davidson Middle School | 373 |
| 96 | John Glenn Middle School of International Studies | 371 |
| 97 | William Mulholland Middle School | 370 |
| 97 | Windemere Ranch Middle School | 370 |
| 99 | G.M. Walters Junior High School | 368 |
| 100 | Patrick Henry Middle School | 365 |
| 100 | Fontana Middle School | 365 |
| 100 | Isbell Middle School | 365 |
| 103 | East Whittier Middle School | 364 |
| 104 | Beattie Middle School | 363 |
| 105 | Adams Middle School | 362 |
| 106 | Robert E. Peary Middle School | 360 |
| 106 | Virgil Middle School | 360 |
| 108 | Sunnymead Middle School | 359 |
| 108 | Chaparral Middle School | 359 |
| 108 | Rialto Middle School | 359 |
| 111 | Herbert Hoover Middle School | 358 |
| 111 | Ethel Dwyer Middle School | 358 |
| 113 | Black Mountain Middle School | 357 |
| 113 | Oliver Wendell Holmes Middle School | 357 |
| 113 | Alexander Fleming Middle School | 357 |
| 113 | Burlingame Intermediate | 357 |
| 117 | Shadow Hills Engineering and Design Magnet Academy | 355 |
| 117 | Park Middle School | 355 |
| 119 | Mesa Verde Middle School | 354 |
| 119 | Sierra Vista Elementary School | 354 |
| 121 | South Pasadena Middle School | 353 |
| 121 | Sam H. Lawson Middle School | 353 |
| 121 | Erle Stanley Gardner Middle School | 353 |
| 124 | Gale Ranch Middle School | 352 |
| 124 | Southeast Middle School | 352 |
| 126 | Charles Blackstock Junior High School | 351 |
| 126 | California Virtual Academy @ Los Angeles | 351 |
| 128 | Creekside Middle School | 350 |
| 128 | Dana School | 350 |
| 128 | David Starr Jordan Middle School | 350 |
| 131 | Newhart Middle School | 349 |
| 131 | M.H. Stanley Middle School | 349 |
| 133 | Weaver Middle School | 348 |
| 134 | Adams J. Douglas Middle School | 346 |
| 135 | James Workman Middle School | 344 |
| 135 | Badger Springs Middle School | 344 |
| 137 | Kolb Middle School | 343 |
| 137 | Cupertino Middle School | 343 |
| 139 | Suzanne Middle School | 342 |
| 140 | Terra Cotta Middle School | 341 |
| 141 | Leon H. Ollivier Middle School | 340 |
| 141 | Union Middle School | 340 |
| 143 | El Monte Middle School | 339 |
| 144 | Moore Middle School | 338 |
| 144 | Jefferson Leadership Academies | 338 |
| 146 | Acacia Middle School | 336 |
| 146 | Benicia Middle School | 336 |
| 148 | Tomas Rivera Middle School | 335 |
| 148 | Pine Valley Middle School | 335 |
| 150 | Nellie N. Coffman Middle School | 334 |
| 151 | Pleasanton Middle School | 333 |
| 152 | Sharon Christa McAuliffe Middle School | 332 |
| 152 | Oak Middle School | 332 |
| 152 | Sunnyvale Middle School | 332 |
| 155 | Jefferson Middle School | 331 |
| 156 | Castillero Middle School | 330 |
| 157 | Aviara Oaks Middle School | 329 |
| 157 | Los Angeles Academy Middle School | 329 |
| 157 | Pacoima Middle School | 329 |
| 160 | James L. Day Middle School | 328 |
| 160 | Cesar Chavez Middle School | 328 |
| 160 | Francisco Sepulveda Middle School | 328 |
| 160 | Edward A. Sussman Middle School | 328 |
| 160 | Walnut Creek Intermediate | 328 |
| 160 | Bear Valley Middle School | 328 |
| 166 | Iron Horse Middle School | 327 |
| 166 | Frisbie Middle School | 327 |
| 168 | Medea Creek Middle School | 326 |
| 168 | Raymond J. Fisher Middle School | 326 |
| 168 | Summit Intermediate | 326 |
| 168 | Pacific Coast Academy | 326 |
| 168 | Desert Willow Fine Arts Science and Technology Magnet Academy | 326 |
| 173 | American Canyon Middle School | 325 |
| 173 | Palm Middle School | 325 |
| 173 | Presidio Middle School | 325 |
| 176 | Loma Vista Middle School | 324 |
| 177 | Park View Middle School | 323 |
| 177 | Elsinore Middle School | 323 |
| 177 | Rancho Viejo Middle School | 323 |
| 180 | Jane Lathrop Stanford Middle School | 322 |
| 181 | Bowditch Middle School | 321 |
| 182 | Ethel Kucera Middle School | 320 |
| 182 | La Merced Intermediate | 320 |
| 182 | Diamond Valley Middle School | 320 |
| 185 | Inspire Charter School - South | 319 |
| 186 | Dartmouth Middle School | 318 |
| 186 | Herbert Hoover Middle School | 318 |
| 188 | Nicolet Middle School | 317 |
| 188 | Elizabeth Ustach Middle School | 317 |
| 188 | David G. Millen Law and Government Magnet Academy | 317 |
| 191 | Olive Vista Middle School | 315 |
| 191 | Richard Henry Dana Middle School | 315 |
| 191 | Standard Middle School | 315 |
| 194 | Vista Verde Middle School | 314 |
| 194 | iLEAD Hybrid School | 314 |
| 196 | Bret Harte Middle School | 313 |
| 196 | Lewis Middle School | 313 |
| 198 | Sequoia Middle School | 312 |
| 198 | Isaac Newton Graham Middle School | 312 |
| 198 | Katherine Edwards Middle School | 312 |

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