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California Medicare plans by county — 2026
58 counties in California are served by 2,030 Medicare plans from 42 carriers in 2026. 851 Medicare Advantage plans have a $0 premium. 6,158,371 residents are 65 or older.
| County | Plans | Carriers | $0 premium | Avg. stars | Residents 65+ | Plans vs. prior year |
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| Alameda County | 49 | 16 | 21 | 3.8 | 254,161 | |
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| Alpine County | 17 | 9 | 0 | 3.1 | 341 | |
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| Amador County | 23 | 10 | 3 | 3.6 | 11,423 | |
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| Butte County | 16 | 8 | 3 | 3.3 | 38,227 | |
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| Calaveras County | 17 | 8 | 0 | 3.2 | 13,517 | |
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| Colusa County | 12 | 6 | 0 | | 3,410 | |
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| Contra Costa County | 23 | 10 | 4 | 3.8 | 199,270 | |
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| Del Norte County | 15 | 7 | 2 | 3.5 | 5,552 | |
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| El Dorado County | 22 | 11 | 3 | 3.7 | 45,254 | |
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| Fresno County | 57 | 15 | 30 | 3.6 | 131,488 | |
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| Glenn County | 15 | 7 | 2 | 3.5 | 4,893 | |
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| Humboldt County | 15 | 7 | 2 | 3.5 | 26,660 | |
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| Imperial County | 33 | 11 | 12 | 3.2 | 24,701 | |
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| Inyo County | 18 | 9 | 2 | 3.3 | 4,675 | |
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| Kern County | 51 | 14 | 27 | 3.4 | 108,560 | |
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| Kings County | 37 | 13 | 18 | 3.5 | 16,584 | |
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| Lake County | 13 | 6 | 0 | 4.0 | 16,290 | |
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| Lassen County | 14 | 6 | 0 | 3.5 | 5,012 | |
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| Los Angeles County | 133 | 23 | 91 | 3.7 | 1,487,700 | |
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| Madera County | 57 | 15 | 30 | 3.6 | 23,148 | |
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| Marin County | 35 | 11 | 13 | 3.8 | 61,345 | |
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| Mariposa County | 21 | 9 | 3 | 3.8 | 5,073 | |
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| Mendocino County | 16 | 7 | 2 | 3.6 | 22,154 | |
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| Merced County | 29 | 10 | 9 | 3.8 | 34,001 | |
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| Modoc County | 15 | 7 | 2 | 3.5 | 2,722 | |
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| Mono County | 20 | 9 | 2 | 3.3 | 2,297 | |
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| Monterey County | 21 | 10 | 4 | 3.1 | 65,068 | |
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| Napa County | 19 | 9 | 5 | 3.5 | 28,455 | |
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| Nevada County | 16 | 7 | 2 | 3.6 | 30,033 | |
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| Orange County | 116 | 19 | 79 | 3.7 | 514,824 | |
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| Placer County | 41 | 11 | 17 | 3.8 | 85,822 | |
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| Plumas County | 17 | 7 | 2 | 3.5 | 6,114 | |
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| Riverside County | 103 | 21 | 68 | 3.7 | 382,888 | |
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| Sacramento County | 50 | 14 | 22 | 3.8 | 243,370 | |
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| San Benito County | 16 | 8 | 2 | 3.5 | 9,234 | |
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| San Bernardino County | 110 | 20 | 75 | 3.6 | 276,984 | |
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| San Diego County | 105 | 20 | 66 | 3.7 | 507,734 | |
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| San Francisco County | 63 | 16 | 31 | 3.7 | 146,510 | |
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| San Joaquin County | 56 | 15 | 23 | 3.6 | 107,730 | |
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| San Luis Obispo County | 30 | 10 | 12 | 3.8 | 62,338 | |
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| San Mateo County | 45 | 16 | 21 | 3.6 | 132,242 | |
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| Santa Barbara County | 21 | 8 | 2 | 3.8 | 73,710 | |
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| Santa Clara County | 58 | 16 | 27 | 3.8 | 282,010 | |
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| Santa Cruz County | 20 | 10 | 3 | 3.9 | 50,275 | |
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| Shasta County | 16 | 8 | 3 | 3.3 | 39,009 | |
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| Sierra County | 14 | 6 | 0 | 3.5 | 963 | |
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| Siskiyou County | 15 | 7 | 2 | 3.5 | 12,101 | |
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| Solano County | 25 | 10 | 8 | 3.5 | 78,738 | |
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| Sonoma County | 21 | 10 | 4 | 3.8 | 104,389 | |
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| Stanislaus County | 50 | 14 | 21 | 3.7 | 76,271 | |
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| Sutter County | 15 | 8 | 1 | 3.8 | 16,216 | |
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| Tehama County | 16 | 8 | 3 | 3.3 | 13,085 | |
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| Trinity County | 12 | 6 | 0 | | 4,795 | |
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| Tulare County | 36 | 13 | 17 | 3.4 | 57,101 | |
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| Tuolumne County | 18 | 9 | 2 | 3.3 | 15,339 | |
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| Ventura County | 47 | 15 | 24 | 3.6 | 145,793 | |
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| Yolo County | 46 | 13 | 20 | 3.8 | 29,712 | |
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| Yuba County | 19 | 9 | 4 | 3.7 | 11,060 | |
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This page summarizes publicly available CMS data. It is not a plan finder and does not recommend plans. To compare and enroll in plans, use Medicare.gov or talk to a licensed agent. Medicare.gov plan finder.