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Washington Medicare plans by county — 2026
39 counties in Washington are served by 1,910 Medicare plans from 15 carriers in 2026. 584 Medicare Advantage plans have a $0 premium. 1,299,185 residents are 65 or older.
| County | Plans | Carriers | $0 premium | Avg. stars | Residents 65+ | Plans vs. prior year |
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| Adams County | 36 | 8 | 9 | 3.3 | 2,529 | |
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| Asotin County | 24 | 7 | 5 | 3.0 | 5,661 | |
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| Benton County | 48 | 9 | 14 | 3.6 | 33,796 | |
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| Chelan County | 39 | 8 | 11 | 3.4 | 16,769 | |
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| Clallam County | 37 | 8 | 11 | 3.5 | 25,067 | |
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| Clark County | 86 | 13 | 31 | 3.6 | 86,076 | |
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| Columbia County | 41 | 8 | 11 | 3.5 | 1,177 | |
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| Cowlitz County | 71 | 10 | 27 | 3.6 | 22,230 | |
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| Douglas County | 43 | 8 | 12 | 3.5 | 8,180 | |
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| Ferry County | 35 | 8 | 9 | 3.3 | 2,263 | |
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| Franklin County | 49 | 9 | 14 | 3.6 | 10,257 | |
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| Garfield County | 41 | 8 | 11 | 3.5 | 613 | |
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| Grant County | 39 | 8 | 11 | 3.4 | 14,822 | |
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| Grays Harbor County | 28 | 9 | 5 | 3.2 | 17,980 | |
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| Island County | 52 | 8 | 15 | 3.6 | 23,259 | |
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| Jefferson County | 53 | 9 | 17 | 3.5 | 13,673 | |
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| King County | 78 | 11 | 26 | 3.7 | 320,899 | |
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| Kitsap County | 71 | 10 | 26 | 3.7 | 54,611 | |
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| Kittitas County | 38 | 8 | 9 | 3.5 | 8,040 | |
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| Klickitat County | 28 | 8 | 7 | 3.3 | 5,878 | |
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| Lewis County | 57 | 9 | 15 | 3.6 | 18,211 | |
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| Lincoln County | 38 | 8 | 9 | 3.5 | 3,012 | |
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| Mason County | 54 | 9 | 15 | 3.6 | 16,468 | |
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| Okanogan County | 39 | 8 | 11 | 3.4 | 10,074 | |
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| Pacific County | 38 | 8 | 11 | 3.5 | 7,921 | |
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| Pend Oreille County | 42 | 8 | 11 | 3.5 | 3,841 | |
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| Pierce County | 83 | 13 | 31 | 3.7 | 137,536 | |
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| San Juan County | 39 | 8 | 11 | 3.5 | 6,656 | |
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| Skagit County | 66 | 10 | 21 | 3.7 | 29,691 | |
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| Skamania County | 45 | 9 | 13 | 3.5 | 3,024 | |
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| Snohomish County | 81 | 11 | 29 | 3.7 | 124,763 | |
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| Spokane County | 69 | 11 | 29 | 3.7 | 95,527 | |
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| Stevens County | 27 | 7 | 8 | 3.2 | 12,178 | |
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| Thurston County | 75 | 11 | 28 | 3.7 | 56,072 | |
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| Wahkiakum County | 49 | 10 | 14 | 3.5 | 1,590 | |
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| Walla Walla County | 46 | 9 | 14 | 3.5 | 12,409 | |
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| Whatcom County | 55 | 8 | 17 | 3.7 | 43,568 | |
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| Whitman County | 29 | 8 | 7 | 3.3 | 5,597 | |
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| Yakima County | 41 | 9 | 9 | 3.5 | 37,267 | |
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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.