| Jewish Federation of San Diego CountyEIN 95-1319015 | Community Development | CA | $6,899,714Mid-sized | 88.68 |
| Jewish Federation of Silicon ValleyEIN 94-1167405 | Community Development | CA | $6,540,576Mid-sized | 95.85 |
| Jewish Federation of the DesertEIN 23-7211881 | Community Development | CA | $2,486,209Small | 81.87 |
| Jewish Federation of the Sacramento RegionEIN 94-1156558 | Community Development | CA | $719,529Small | 91.50 |
| Jewish Free Loan AssociationEIN 95-1691014 | Community Development | CA | $1,729,874Small | 81.28 |
| Jewish World WatchEIN 20-3406211 | International | CA | $1,639,407Small | 95.03 |
| JobTrainEIN 94-1712371 | Education | CA | $6,169,313Mid-sized | 89.54 |
| John Muir Health FoundationEIN 94-2650855 | Health | CA | $6,418,086Mid-sized | 87.93 |
| John Tracy ClinicEIN 95-1642393 | Human Services | CA | $3,564,102Mid-sized | 81.85 |
| John Wayne Cancer InstituteEIN 95-4291515 | Health | CA | $15,682,579Large | 71.34 |
| Joni and FriendsEIN 95-3402002 | Religion | CA | $26,837,655Large | 88.41 |
| Jonsson Cancer Center FoundationEIN 95-2242757 | Health | CA | $12,794,531Mid-sized | 97.17 |
| Juma VenturesEIN 94-3203203 | Human Services | CA | $6,818,582Mid-sized | 78.56 |
| Junior Achievement of San Diego and Imperial CountiesEIN 95-1727087 | Education | CA | $3,246,558Small | 87.64 |
| Just Detention InternationalEIN 13-3711840 | International | CA | $3,454,847Small | 96.46 |
| JVSEIN 94-2213100 | Human Services | CA | $10,777,160Mid-sized | 93.26 |
| JVS SoCalEIN 95-1691012 | Human Services | CA | $17,858,410Large | 87.92 |
| Kare Youth LeagueEIN 95-1869644 | Human Services | CA | $5,423,003Mid-sized | 86.10 |
| Katahdin ProductionsEIN 90-0089252 | Arts, Culture, Humanities | CA | $2,078,366Small | 65.83 |
| KCBXEIN 23-7292203 | Arts, Culture, Humanities | CA | $1,284,419Small | 86.74 |
| KCETLinkEIN 95-2211661 | Arts, Culture, Humanities | CA | $28,403,983Large | 77.03 |
| KCRW FoundationEIN 95-3750631 | Arts, Culture, Humanities | CA | $19,335,725Large | 90.18 |
| Khan AcademyEIN 26-1544963 | Education | CA | $37,495,508Large | 92.02 |
| Khyentse FoundationEIN 91-2167303 | Religion | CA | $2,419,910Small | 86.56 |
| KickStart InternationalEIN 06-1613235 | International | CA | $6,397,358Mid-sized | 84.09 |
| KiddoEIN 94-2848305 | Education | CA | $3,335,426Small | 91.14 |
| KidsaveEIN 91-1887623 | International | CA | $1,812,547Small | 93.79 |
| Kidspace Children's MuseumEIN 95-3501213 | Arts, Culture, Humanities | CA | $5,636,442Mid-sized | 94.98 |
| KidworksEIN 74-3081569 | Human Services | CA | $2,790,670Small | 88.21 |
| KIK Kentfield Schools FoundationEIN 94-2665683 | Education | CA | $1,406,607Small | 73.26 |
| KivaEIN 71-0992446 | International | CA | $17,714,851Large | 91.60 |
| KIXE-TVEIN 94-1569300 | Arts, Culture, Humanities | CA | $1,476,890Small | 85.09 |
| KOCE-TV Foundation/PBS SoCalEIN 95-3220724 | Arts, Culture, Humanities | CA | $18,180,419Large | 93.42 |
| Kōkua Hawaiʻi FoundationEIN 20-0315475 | Education | CA | $727,147Small | 69.49 |
| KQEDEIN 94-1241309 | Arts, Culture, Humanities | CA | $81,269,351Large | 91.32 |
| KVIEEIN 94-1421463 | Arts, Culture, Humanities | CA | $10,941,160Mid-sized | 86.34 |
| La Casa de las MadresEIN 94-2330864 | Human Services | CA | $2,590,639Small | 86.81 |
| La Jolla Music SocietyEIN 23-7148171 | Arts, Culture, Humanities | CA | $4,368,421Mid-sized | 85.59 |
| La Jolla PlayhouseEIN 95-1941117 | Arts, Culture, Humanities | CA | $19,706,336Large | 87.34 |
| LA OperaEIN 95-2096402 | Arts, Culture, Humanities | CA | $42,265,305Large | 87.42 |
| LA Promise FundEIN 20-4562686 | Education | CA | $5,769,247Mid-sized | 93.65 |
| Laguna Art MuseumEIN 33-0717157 | Arts, Culture, Humanities | CA | $2,339,192Small | 73.10 |
| Lange FoundationEIN 95-4407687 | Animals | CA | $1,705,600Small | 96.22 |
| Larkin Street Youth ServicesEIN 94-2917999 | Human Services | CA | $18,597,674Large | 90.64 |
| Last Chance for AnimalsEIN 95-4013155 | Animals | CA | $2,442,653Small | 98.23 |
| Latino Health AccessEIN 33-0562943 | Human Services | CA | $2,557,543Small | 85.02 |
| Laura's HouseEIN 33-0621826 | Human Services | CA | $3,677,412Mid-sized | 91.77 |
| Lawrence Family Jewish Community Center, Jacobs Family CampusEIN 95-1985444 | Human Services | CA | $12,171,345Mid-sized | 90.46 |
| League to Save Lake TahoeEIN 94-6128680 | Environment | CA | $2,194,842Small | 85.65 |
| Legal Aid Society of San Mateo CountyEIN 94-1451894 | Human and Civil Rights | CA | $2,751,433Small | 89.37 |
| Legal Services for ChildrenEIN 51-0169463 | Human and Civil Rights | CA | $2,541,488Small | 89.89 |
| Level Playing Field InstituteEIN 91-2088635 | Education | CA | $5,201,047Mid-sized | 79.21 |
| Liberty Hill FoundationEIN 51-0181191 | Community Development | CA | $8,848,390Mid-sized | 92.75 |
| Liberty in North KoreaEIN 73-1710135 | International | CA | $2,117,955Small | 88.50 |
| Library Foundation of Los AngelesEIN 95-4368250 | Arts, Culture, Humanities | CA | $6,805,193Mid-sized | 94.18 |
| Life Legal Defense FoundationEIN 68-0191488 | Human and Civil Rights | CA | $2,096,898Small | 93.76 |
| Life Without LimbsEIN 37-1511251 | Religion | CA | $1,671,772Small | 68.82 |
| LifeMovesEIN 77-0160469 | Human Services | CA | $21,083,252Large | 90.87 |
| Lifesavers Wild Horse RescueEIN 95-4631906 | Animals | CA | $2,016,560Small | 78.85 |
| Lifewater InternationalEIN 95-3987142 | International | CA | $4,367,208Mid-sized | 92.49 |