Visions In Education had the most 12th-grade students enrolled in California with 1,227.
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 | Visions In Education | 1,227 | 
| 2 | Granada Hills Charter High School | 1,132 | 
| 3 | Eleanor Roosevelt High School | 1,090 | 
| 4 | Paramount High School | 1,072 | 
| 5 | Central High East Campus | 975 | 
| 6 | Polytechnic High School | 951 | 
| 7 | Downey High School | 925 | 
| 8 | Santiago High School | 899 | 
| 9 | Wilson High School | 897 | 
| 10 | Millikan High School | 890 | 
| 11 | El Camino Real Charter High School | 889 | 
| 12 | Earl Warren High School | 878 | 
| 13 | Rancho Cucamonga High School | 870 | 
| 14 | Chaffey High School | 865 | 
| 15 | Fountain Valley High School | 853 | 
| 16 | Pittsburg Senior High School | 852 | 
| 17 | James Logan High School | 846 | 
| 18 | Berkeley High School | 836 | 
| 19 | Etiwanda High School | 833 | 
| 20 | Sweetwater High School | 827 | 
| 21 | Milpitas High School | 810 | 
| 22 | San Marcos High School | 805 | 
| 22 | Vista Murrieta High School | 805 | 
| 24 | Dougherty Valley High School | 802 | 
| 25 | Arcadia High School | 793 | 
| 26 | Los Alamitos High School | 790 | 
| 27 | San Clemente High School | 788 | 
| 28 | Los Osos High School | 786 | 
| 29 | San Benito High School | 776 | 
| 30 | Evergreen Valley High School | 766 | 
| 31 | Redondo Union High School | 761 | 
| 32 | Pacifica High School | 758 | 
| 33 | Cypress High School | 753 | 
| 34 | Clovis High School | 751 | 
| 35 | Great Oak High School | 748 | 
| 36 | California High School | 746 | 
| 37 | Paloma Valley High School | 744 | 
| 38 | Palisades Charter High School | 743 | 
| 39 | Aliso Niguel High School | 742 | 
| 40 | Sanger High School | 738 | 
| 41 | Dublin High School | 737 | 
| 42 | Arnold O. Beckman High School | 735 | 
| 43 | Santa Monica High School | 734 | 
| 44 | Independence High School | 732 | 
| 45 | San Ysidro High School | 731 | 
| 45 | Santa Ana High School | 731 | 
| 47 | Upland High School | 730 | 
| 47 | William J. (Pete) Knight High School | 730 | 
| 49 | Temecula Valley High School | 727 | 
| 50 | Lowell High School | 719 | 
| 51 | Birmingham Community Charter High School | 718 | 
| 52 | Eastlake High School | 715 | 
| 53 | Alisal High School | 706 | 
| 54 | Quartz Hill High School | 705 | 
| 55 | Valencia High School | 704 | 
| 56 | Ruben S. Ayala High School | 696 | 
| 56 | Chaparral High School | 696 | 
| 58 | Franklin High School | 695 | 
| 58 | Centennial High School | 695 | 
| 60 | San Juan Hills High School | 694 | 
| 61 | Martin Luther King Jr. High School | 693 | 
| 61 | Ridgeview High School | 693 | 
| 63 | Lakewood High School | 691 | 
| 64 | Calexico High School | 690 | 
| 65 | Santa Maria High School | 688 | 
| 66 | Cajon High School | 687 | 
| 66 | Chino Hills High School | 687 | 
| 66 | Bakersfield High School | 687 | 
| 69 | Huntington Beach High School | 686 | 
| 70 | Amador Valley High School | 683 | 
| 71 | Castro Valley High School | 681 | 
| 71 | Madera South High School | 681 | 
| 73 | Stanislaus Alternative Charter School | 678 | 
| 74 | Opportunities for Learning - Baldwin Park | 675 | 
| 74 | Grover Cleveland Charter High School | 675 | 
| 76 | Lincoln High School | 670 | 
| 77 | El Camino High School | 666 | 
| 77 | Capistrano Connections Academy | 666 | 
| 79 | Yucaipa High School | 665 | 
| 80 | Beaumont Senior High School | 661 | 
| 81 | Westminster High School | 658 | 
| 81 | Liberty High School | 658 | 
| 83 | Trabuco Hills High School | 657 | 
| 84 | Oxnard High School | 656 | 
| 85 | Sunnyside High School | 655 | 
| 85 | Heritage High School | 655 | 
| 87 | Highland High School | 654 | 
| 88 | Montclair High School | 652 | 
| 89 | Mission Hills High School | 651 | 
| 90 | Mira Monte High School | 650 | 
| 91 | Canyon Crest Academy | 649 | 
| 92 | Mira Costa High School | 648 | 
| 93 | Valencia High School | 647 | 
| 94 | Katella High School | 644 | 
| 95 | Edison High School | 642 | 
| 96 | Modesto High School | 636 | 
| 97 | Crescenta Valley High School | 635 | 
| 97 | California High School | 635 | 
| 99 | Heritage High School | 634 | 
| 100 | Coachella Valley High School | 629 | 
| 100 | Dana Hills High School | 629 | 
| 100 | Murrieta Mesa High School | 629 | 
| 103 | John H. Francis Polytechnic High School | 628 | 
| 104 | Valley View High School | 627 | 
| 104 | Salinas High School | 627 | 
| 104 | Everett Alvarez High School | 627 | 
| 107 | Channel Islands High School | 626 | 
| 108 | Sheldon High School | 625 | 
| 108 | San Leandro High School | 625 | 
| 110 | La Serna High School | 624 | 
| 111 | Troy High School | 623 | 
| 112 | Buchanan High School | 622 | 
| 113 | Folsom High School | 621 | 
| 114 | Stockdale High School | 619 | 
| 115 | Summit High School | 618 | 
| 116 | Diamond Bar High School | 617 | 
| 116 | Burbank High School | 617 | 
| 118 | Carlsbad High School | 616 | 
| 118 | Glendora High School | 616 | 
| 120 | Alhambra High School | 615 | 
| 121 | Henry High School | 614 | 
| 122 | Tesoro High School | 613 | 
| 123 | Clovis North High School | 612 | 
| 124 | Granite Hills High School | 611 | 
| 124 | Golden Valley High School | 611 | 
| 126 | Silver Creek High School | 609 | 
| 126 | Schurr High School | 609 | 
| 128 | Alexander Hamilton Senior High School | 608 | 
| 129 | Montebello High School | 607 | 
| 130 | Palmdale High School | 606 | 
| 131 | Newbury Park High School | 605 | 
| 132 | Redlands Senior High School | 604 | 
| 132 | Clovis East High School | 604 | 
| 134 | Oak Ridge High School | 603 | 
| 135 | Fremont High School | 602 | 
| 135 | James C. Enochs High School | 602 | 
| 137 | Marina High School | 601 | 
| 138 | Burroughs High School | 600 | 
| 139 | Monte Vista High School | 599 | 
| 140 | Bell Gardens High School | 598 | 
| 141 | Menlo-Atherton High School | 597 | 
| 141 | Helix High School | 597 | 
| 141 | Foothill High School | 597 | 
| 141 | John Marshall Senior High School | 597 | 
| 145 | Turlock High School | 596 | 
| 145 | Homestead High School | 596 | 
| 145 | Westview High School | 596 | 
| 145 | Rialto High School | 596 | 
| 145 | Eastside High School | 596 | 
| 150 | one.Charter School | 595 | 
| 151 | Chula Vista Senior High School | 594 | 
| 151 | Bullard High School | 594 | 
| 153 | Van Nuys Senior High School | 593 | 
| 154 | Davis Senior High School | 592 | 
| 155 | West Ranch High School | 591 | 
| 156 | Freedom High School | 590 | 
| 156 | Pleasant Grove High School | 590 | 
| 158 | Anaheim High School | 589 | 
| 159 | Otay Ranch Senior High School | 588 | 
| 160 | Hemet High School | 585 | 
| 160 | Olympian High School | 585 | 
| 160 | Pioneer Valley High School | 585 | 
| 163 | Arroyo Valley High School | 584 | 
| 163 | Newport Harbor High School | 584 | 
| 165 | Escondido High School | 583 | 
| 165 | Rancho Bernardo High School | 583 | 
| 167 | Garden Grove High School | 582 | 
| 167 | Palos Verdes Peninsula High School | 582 | 
| 169 | Highland High School | 581 | 
| 169 | American High School | 581 | 
| 171 | Monta Vista High School | 579 | 
| 171 | Claremont High School | 579 | 
| 173 | Bloomington High School | 578 | 
| 173 | Edison High School | 578 | 
| 175 | Alta Loma High School | 577 | 
| 175 | Lancaster High School | 577 | 
| 175 | Walnut High School | 577 | 
| 175 | Hector G. Godinez School | 577 | 
| 179 | Culver City High School | 576 | 
| 180 | Ontario High School | 575 | 
| 180 | San Jacinto High School | 575 | 
| 180 | Del Norte High School | 575 | 
| 183 | Bonita Vista Senior High School | 574 | 
| 183 | La Quinta High School | 574 | 
| 183 | Saugus High School | 574 | 
| 186 | La Quinta High School | 571 | 
| 186 | James A. Garfield Senior High School | 571 | 
| 188 | Valhalla High School | 570 | 
| 189 | Los Altos High School | 569 | 
| 190 | San Ramon Valley High School | 568 | 
| 191 | Irvington High School | 567 | 
| 192 | Redwood High School | 564 | 
| 193 | Poway High School | 563 | 
| 193 | Torrey Pines High School | 563 | 
| 193 | Rosemead High School | 563 | 
| 193 | Arvin High School | 563 | 
| 197 | River City High School | 562 | 
| 197 | Carlmont High School | 562 | 
| 199 | Rio Mesa High School | 561 | 
| 199 | Cerritos High School | 561 | 

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