Paramount High School had the most 12th-grade students enrolled in California with 1,135.
According to numbers provided by the National Center for Education Services, California is expected to see a decrease of three percent in public elementary and secondary school enrollment 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 projected 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 | Paramount High School | 1,135 |
| 2 | Granada Hills Charter High School | 1,120 |
| 3 | Visions In Education | 1,107 |
| 4 | Eleanor Roosevelt High School | 1,083 |
| 5 | Downey High School | 1,050 |
| 6 | Polytechnic High School | 1,007 |
| 7 | Central High East Campus | 913 |
| 8 | El Camino Real Charter High School | 904 |
| 9 | James Logan High School | 885 |
| 10 | Vista Murrieta High School | 884 |
| 11 | Etiwanda High School | 851 |
| 12 | Earl Warren High School | 845 |
| 13 | Arcadia High School | 829 |
| 14 | Millikan High School | 824 |
| 15 | Wilson High School | 818 |
| 16 | Santiago High School | 813 |
| 17 | San Clemente High School | 808 |
| 18 | Fountain Valley High School | 805 |
| 19 | Eastlake High School | 802 |
| 20 | Rancho Cucamonga High School | 798 |
| 20 | Birmingham Community Charter High School | 798 |
| 22 | El Camino High School | 795 |
| 23 | Centennial High School | 786 |
| 24 | Chaffey High School | 782 |
| 25 | Dougherty Valley High School | 766 |
| 26 | Upland High School | 764 |
| 27 | Los Osos High School | 763 |
| 28 | Milpitas High School | 762 |
| 29 | Calexico High School | 761 |
| 30 | Arnold O. Beckman High School | 760 |
| 31 | Martin Luther King Jr. High School | 759 |
| 32 | Los Alamitos High School | 758 |
| 33 | Great Oak High School | 756 |
| 34 | Quartz Hill High School | 750 |
| 35 | Aliso Niguel High School | 749 |
| 35 | Diamond Bar High School | 749 |
| 37 | San Marcos High School | 748 |
| 38 | San Benito High School | 744 |
| 39 | Lakewood High School | 743 |
| 40 | Sanger High School | 734 |
| 41 | Clovis High School | 733 |
| 42 | Sweetwater High School | 732 |
| 43 | Pacifica High School | 726 |
| 44 | Chaparral High School | 722 |
| 44 | Anaheim High School | 722 |
| 46 | Huntington Beach High School | 718 |
| 47 | Paloma Valley High School | 717 |
| 48 | Pittsburg Senior High School | 716 |
| 49 | Santa Monica High School | 715 |
| 49 | Berkeley High School | 715 |
| 51 | Palisades Charter High School | 714 |
| 51 | Valencia High School | 714 |
| 53 | Cypress High School | 713 |
| 54 | Evergreen Valley High School | 712 |
| 55 | Redondo Union High School | 709 |
| 56 | Montclair High School | 705 |
| 57 | Chino Hills High School | 704 |
| 58 | San Ysidro High School | 702 |
| 59 | Ruben S. Ayala High School | 695 |
| 60 | Bakersfield High School | 693 |
| 61 | Highland High School | 691 |
| 62 | Independence High School | 683 |
| 63 | Lowell High School | 678 |
| 64 | Lincoln High School | 676 |
| 65 | John H. Francis Polytechnic | 675 |
| 66 | Chula Vista Senior High School | 672 |
| 67 | California High School | 670 |
| 68 | Dana Hills High School | 669 |
| 68 | Edison High School | 669 |
| 68 | Trabuco Hills High School | 669 |
| 71 | Tesoro High School | 668 |
| 71 | William J. (Pete) Knight High School | 668 |
| 73 | Buchanan High School | 667 |
| 74 | Walnut High School | 666 |
| 74 | Ridgeview High School | 666 |
| 76 | Valencia High School | 663 |
| 77 | San Leandro High School | 662 |
| 78 | Bonita Vista Senior High School | 659 |
| 79 | West Ranch High School | 655 |
| 80 | John F. Kennedy High School | 654 |
| 80 | Amador Valley High School | 654 |
| 82 | Bell Gardens High School | 653 |
| 83 | Beaumont Senior High School | 652 |
| 84 | Katella High School | 651 |
| 84 | Alisal High School | 651 |
| 84 | Grover Cleveland Charter High School | 651 |
| 87 | Freedom High School | 649 |
| 88 | Santa Ana High School | 648 |
| 88 | Alhambra High School | 648 |
| 88 | California High School | 648 |
| 91 | Salinas High School | 646 |
| 92 | Menlo-Atherton High School | 644 |
| 92 | Castro Valley High School | 644 |
| 94 | Temecula Valley High School | 642 |
| 95 | Canyon Crest Academy | 635 |
| 96 | Alta Loma High School | 634 |
| 97 | University High School | 633 |
| 98 | Cajon High School | 631 |
| 98 | Crescenta Valley High School | 631 |
| 98 | Olympian High School | 631 |
| 101 | Yucaipa High School | 628 |
| 101 | Westminster High School | 628 |
| 101 | Montebello High School | 628 |
| 104 | Torrey Pines High School | 627 |
| 104 | Hector G. Godinez | 627 |
| 106 | Otay Ranch Senior High School | 626 |
| 107 | Cupertino High School | 625 |
| 108 | Troy High School | 624 |
| 109 | Northwood High School | 623 |
| 110 | Marina High School | 622 |
| 110 | Dublin High School | 622 |
| 112 | Palmdale High School | 621 |
| 112 | Madera South High School | 621 |
| 114 | Mira Mesa High School | 620 |
| 114 | Sunnyside High School | 620 |
| 116 | Schurr High School | 619 |
| 117 | La Quinta High School | 618 |
| 117 | Capistrano Connections Academy | 618 |
| 119 | Woodbridge High School | 616 |
| 119 | Arvin High School | 616 |
| 121 | Sheldon High School | 614 |
| 122 | Opportunities for Learning - Baldwin Park | 613 |
| 123 | Channel Islands High School | 611 |
| 123 | Rialto High School | 611 |
| 125 | Liberty High School | 610 |
| 125 | Heritage High School | 610 |
| 127 | Palos Verdes Peninsula High School | 609 |
| 127 | La Serna High School | 609 |
| 127 | Stanislaus Alternative Charter School | 609 |
| 130 | Coachella Valley High School | 607 |
| 130 | Everett Alvarez High School | 607 |
| 132 | Jordan High School | 606 |
| 133 | Homestead High School | 605 |
| 134 | John Muir Charter School | 604 |
| 135 | Polytechnic High School | 600 |
| 136 | Hilltop Senior High School | 599 |
| 137 | Rancho Bernardo High School | 597 |
| 137 | Monte Vista High School | 597 |
| 139 | Oxnard High School | 596 |
| 139 | Newbury Park High School | 596 |
| 139 | Westview High School | 596 |
| 142 | Franklin High School | 595 |
| 142 | Valley View High School | 595 |
| 144 | Mira Costa High School | 594 |
| 145 | Silver Creek High School | 592 |
| 145 | El Rancho High School | 592 |
| 145 | Oak Ridge High School | 592 |
| 148 | Glendora High School | 591 |
| 148 | Claremont High School | 591 |
| 150 | Santa Maria High School | 588 |
| 150 | Ontario High School | 588 |
| 152 | Pioneer Valley High School | 587 |
| 153 | Burbank High School | 586 |
| 154 | Modesto High School | 585 |
| 154 | Alexander Hamilton Senior High School | 585 |
| 156 | Monta Vista High School | 584 |
| 156 | Villa Park High School | 584 |
| 156 | Burroughs High School | 584 |
| 156 | Clovis East High School | 584 |
| 156 | Mission Hills High School | 584 |
| 161 | Monterey Trail High School | 583 |
| 161 | Wilmer Amina Carter High School | 583 |
| 163 | Corona High School | 581 |
| 163 | James A. Garfield Senior High School | 581 |
| 165 | Escondido High School | 580 |
| 165 | Cosumnes Oaks High School | 580 |
| 165 | San Juan Hills High School | 580 |
| 165 | Golden Valley High School | 580 |
| 169 | Mark Keppel High School | 579 |
| 170 | Helix High School | 578 |
| 171 | Tustin High School | 577 |
| 171 | James C. Enochs High School | 577 |
| 173 | Clovis North High School | 576 |
| 173 | Frontier High School | 576 |
| 175 | Lancaster High School | 575 |
| 175 | Bell Senior High School | 575 |
| 177 | San Jacinto High School | 574 |
| 177 | Murrieta Mesa High School | 574 |
| 177 | Heritage High School | 574 |
| 180 | Hemet High School | 573 |
| 180 | North Hollywood Senior High School | 573 |
| 182 | Murrieta Valley High School | 572 |
| 182 | Canyon High School | 572 |
| 184 | Oak Hills High School | 570 |
| 185 | Davis Senior High School | 569 |
| 185 | Redlands Senior High School | 569 |
| 185 | Garden Grove High School | 569 |
| 188 | Granada High School | 567 |
| 189 | Valhalla High School | 565 |
| 189 | Arroyo Valley High School | 565 |
| 191 | Sunny Hills High School | 563 |
| 191 | Educational Partnership High School | 563 |
| 191 | Mira Monte High School | 563 |
| 194 | Mission Viejo High School | 562 |
| 194 | Eastside High School | 562 |
| 196 | La Quinta High School | 561 |
| 197 | Edison High School | 560 |
| 198 | El Toro High School | 559 |
| 199 | Granite Hills High School | 557 |
| 200 | Pleasant Grove High School | 556 |

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