| Station | Format | Owner/LMA | Jan21 | Feb21 | Mar21 | Cume |
| KRTH-FM | Classic Hits | Audacy | 5.6 | 5.9 | 6.1 | 2,101,900 |
| KFI-AM | Talk | iHeartMedia, Inc. | 5.0 | 5.0 | 5.7 | 758,300 |
| KOST-FM | Adult Contemporary | iHeartMedia, Inc. | 5.7 | 5.6 | 5.3 | 2,196,200 |
| KTWV-FM | Urban Adult Contemporary | Audacy | 4.6 | 4.4 | 4.5 | 1,592,700 |
| KCBS-FM | Adult Hits | Audacy | 3.4 | 4.0 | 4.0 | 1,644,700 |
| KLVE-FM | Romantica | Univision Radio | 4.0 | 4.0 | 3.9 | 1,186,400 |
| KBIG-FM | Hot AC | iHeartMedia, Inc. | 3.5 | 3.8 | 3.9 | 1,960,800 |
| KIIS-FM / KVVS-FM | CHR | iHeartMedia, Inc. | 3.3 | 3.3 | 3.5 | 1,806,700 |
| KNX-AM | News | Audacy | 3.3 | 2.9 | 3.4 | 875,600 |
| KLAX-FM | Regional Mexican | Spanish Broadcasting System | 3.4 | 3.5 | 3.3 | 912,800 |
| KPCC-FM | News/Talk | Pasadena Area Community College | 3.6 | 3.3 | 3.2 | 629,100 |
| KLOS-FM | Classic Rock | Meruelo Media Holdings, LLC | 2.8 | 3.1 | 3.0 | 1,051,900 |
| KYSR-FM / KSRY-FM | Modern/Alternative Rock | iHeartMedia, Inc. | 2.7 | 2.7 | 2.8 | 1,110,300 |
| KRCD-FM / KRCV-FM | Spanish Adult Hits | Univision Radio | 2.9 | 2.6 | 2.7 | 758,400 |
| KSCA-FM | Regional Mexican | Univision Radio | 2.1 | 2.0 | 2.3 | 752,500 |
| KLYY-FM | Spanish Adult Hits | Entravision Communications Corp. | 2.5 | 2.4 | 2.2 | 655,800 |
| KXOL-FM | Spanish CHR | Spanish Broadcasting System | 2.3 | 2.1 | 2.2 | 874,500 |
| KKGO-FM | Country | Mount Wilson FM Broadcasters | 2.2 | 2.4 | 2.1 | 747,600 |
| KRRL-FM | Urban Contemporary | iHeartMedia, Inc. | 2.0 | 1.7 | 2.1 | 977,000 |
| KLLI-FM | Spanish CHR | Meruelo Media Holdings, LLC | 1.2 | 2.2 | 1.9 | 686,500 |
| KROQ-FM | Modern/Alternative Rock | Audacy | 1.7 | 2.1 | 1.9 | 1,015,500 |
| KUSC-FM | Classical | University of Southern California | 2.1 | 1.9 | 1.8 | 562,400 |
| KCRW-FM / KCRI-FM / KCRU-FM / KCRY-FM | News/Talk | Santa Monica College | 1.8 | 1.5 | 1.6 | 406,200 |
| KPWR-FM | Rhythmic-CHR | Meruelo Media Holdings, LLC | 1.3 | 1.7 | 1.5 | 897,900 |
| KJLH-FM | Urban Adult Contemporary | TAXI Productions, Inc. | 1.3 | 1.2 | 1.4 | 324,300 |
| KAMP-FM | CHR | Audacy | 1.3 | 1.2 | 1.2 | 902,700 |
| KDAY-FM | Classic Hip Hop | Meruelo Media Holdings, LLC | 1.0 | 1.2 | 1.2 | 675,100 |
| KRLA-AM | Talk | Salem Media Group | 1.1 | 0.9 | 1.1 | 232,300 |
| KDLD-FM | Spanish CHR | Entravision Communications Corp. | 0.9 | 1.1 | 1.0 | 402,900 |
| KFWB-AM | Ranchera | Lotus Communications Corp. | 0.8 | 1.1 | 1.0 | 159,500 |
| KABC-AM | Talk | Cumulus Media, Inc. | 1.1 | 0.9 | 1.0 | 254,100 |
| KBUE-FM / KEBN-FM / KBUA-FM | Regional Mexican | Estrella Media | 1.2 | 1.1 | 0.9 | 493,700 |
| KFSH-FM | Contemporary Christian | Salem Media Group | 1.0 | 0.8 | 0.9 | 284,900 |
| KWIZ-FM | Ranchera | Estrella Media | 0.6 | 0.9 | 0.8 | 191,300 |
| KLAC-AM | Sports | iHeartMedia, Inc. | 0.8 | 0.6 | 0.8 | 208,900 |
| KEIB-AM | Talk | iHeartMedia, Inc. | 1.2 | 0.9 | 0.6 | 169,300 |
| KKJZ-FM | Jazz | California State University-Long Beach | 0.6 | 0.6 | 0.6 | 273,100 |
| KSPN-AM | Sports | Disney | 0.6 | 0.5 | 0.5 | 204,900 |
| KTNQ-AM | Spanish News-Talk | Univision Radio | 0.6 | 0.6 | 0.4 | 89,400 |
| KCSN-FM | Adult Alternative | California State University-Northridge | 0.4 | 0.3 | 0.3 | 127,100 |
| KKLA-FM | Religious Teaching | Salem Media Group | 0.3 | 0.3 | 0.3 | 88,900 |
| KHJ-AM | Religious Teaching | Relevant Radio | 0.4 | 0.2 | 0.3 | 52,200 |
| KLOS-FM Stream | Classic Rock | Meruelo Media Holdings, LLC | 0.2 | 0.2 | 0.2 | 44,700 |
| KIRN-AM | Ethnic | Lotus Communications Corp. | 0.1 | 0.2 | 0.2 | 19,300 |
| KMZT-AM | Classical | Mount Wilson FM Broadcasters | 0.2 | 0.1 | 0.1 | 38,700 |
| KROQ-HD2 | 80s Hits | Audacy | 0.1 | 0.1 | 0.1 | 60,600 |
| KWKW-AM | Spanish Sports | Lotus Communications Corp. | 0.1 | 0.1 | 0.1 | 42,600 |
| KKGO-HD2 | Oldies | Mount Wilson FM Broadcasters | 0.0 | 0.0 | 0.1 | 20,600 |
| KPWR-FM Stream | Rhythmic-CHR | Meruelo Media Holdings, LLC | 0.1 | 0.0 | 0.0 | 14,700 |