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Illinois Medicare plans by county — 2026
102 counties in Illinois are served by 4,768 Medicare plans from 17 carriers in 2026. 1,706 Medicare Advantage plans have a $0 premium. 2,156,214 residents are 65 or older.
| County | Plans | Carriers | $0 premium | Avg. stars | Residents 65+ | Plans vs. prior year |
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| Adams County | 39 | 9 | 13 | 3.6 | 13,317 | |
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| Alexander County | 37 | 9 | 12 | 3.7 | 1,215 | |
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| Bond County | 61 | 11 | 27 | 3.7 | 3,137 | |
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| Boone County | 63 | 11 | 30 | 3.3 | 8,916 | |
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| Brown County | 43 | 9 | 13 | 3.4 | 1,029 | |
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| Bureau County | 46 | 9 | 16 | 3.5 | 7,614 | |
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| Calhoun County | 56 | 9 | 26 | 3.6 | 1,101 | |
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| Carroll County | 37 | 9 | 9 | 3.5 | 3,768 | |
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| Cass County | 47 | 10 | 15 | 3.4 | 2,307 | |
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| Champaign County | 32 | 8 | 10 | 3.4 | 28,984 | |
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| Christian County | 45 | 9 | 14 | 3.4 | 6,797 | |
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| Clark County | 42 | 9 | 11 | 3.5 | 3,095 | |
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| Clay County | 38 | 9 | 11 | 3.5 | 2,727 | |
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| Clinton County | 65 | 12 | 31 | 3.7 | 6,955 | |
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| Coles County | 38 | 9 | 11 | 3.5 | 8,592 | |
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| Cook County | 90 | 16 | 49 | 3.6 | 827,156 | |
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| Crawford County | 40 | 9 | 11 | 3.5 | 3,659 | |
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| Cumberland County | 38 | 9 | 11 | 3.5 | 2,173 | |
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| De Witt County | 42 | 9 | 11 | 3.5 | 3,182 | |
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| DeKalb County | 52 | 10 | 21 | 3.5 | 14,020 | |
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| Douglas County | 38 | 8 | 9 | 3.5 | 3,679 | |
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| DuPage County | 84 | 16 | 44 | 3.6 | 161,240 | |
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| Edgar County | 39 | 8 | 10 | 3.5 | 4,080 | |
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| Edwards County | 39 | 8 | 10 | 3.5 | 1,370 | |
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| Effingham County | 35 | 8 | 10 | 3.5 | 6,501 | |
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| Fayette County | 45 | 9 | 17 | 3.6 | 4,164 | |
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| Ford County | 41 | 8 | 13 | 3.5 | 2,628 | |
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| Franklin County | 38 | 9 | 11 | 3.5 | 7,835 | |
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| Fulton County | 38 | 9 | 9 | 3.5 | 7,089 | |
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| Gallatin County | 38 | 9 | 11 | 3.5 | 1,217 | |
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| Greene County | 53 | 10 | 22 | 3.6 | 2,434 | |
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| Grundy County | 55 | 10 | 18 | 3.6 | 8,031 | |
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| Hamilton County | 38 | 9 | 11 | 3.5 | 1,816 | |
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| Hancock County | 36 | 9 | 9 | 3.5 | 4,256 | |
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| Hardin County | 38 | 9 | 11 | 3.5 | 1,076 | |
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| Henderson County | 41 | 9 | 12 | 3.5 | 1,710 | |
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| Henry County | 43 | 9 | 13 | 3.5 | 10,591 | |
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| Iroquois County | 48 | 10 | 16 | 3.5 | 5,977 | |
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| Jackson County | 40 | 9 | 14 | 3.6 | 8,778 | |
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| Jasper County | 40 | 9 | 11 | 3.5 | 1,926 | |
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| Jefferson County | 38 | 9 | 11 | 3.5 | 7,298 | |
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| Jersey County | 62 | 11 | 31 | 3.7 | 4,391 | |
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| Jo Daviess County | 44 | 10 | 12 | 3.5 | 6,541 | |
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| Johnson County | 37 | 8 | 10 | 3.5 | 2,630 | |
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| Kane County | 82 | 15 | 43 | 3.5 | 80,391 | |
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| Kankakee County | 76 | 12 | 39 | 3.5 | 19,030 | |
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| Kendall County | 62 | 12 | 27 | 3.5 | 15,466 | |
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| Knox County | 43 | 9 | 12 | 3.5 | 10,907 | |
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| Lake County | 72 | 14 | 35 | 3.7 | 112,792 | |
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| LaSalle County | 50 | 9 | 16 | 3.5 | 21,669 | |
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| Lawrence County | 36 | 9 | 8 | 3.5 | 2,779 | |
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| Lee County | 51 | 10 | 18 | 3.5 | 7,227 | |
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| Livingston County | 46 | 8 | 15 | 3.5 | 7,164 | |
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| Logan County | 43 | 9 | 12 | 3.5 | 5,409 | |
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| Macon County | 38 | 9 | 9 | 3.5 | 21,412 | |
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| Macoupin County | 57 | 12 | 27 | 3.6 | 9,566 | |
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| Madison County | 70 | 12 | 36 | 3.6 | 48,934 | |
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| Marion County | 37 | 9 | 12 | 3.5 | 7,473 | |
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| Marshall County | 44 | 9 | 14 | 3.4 | 2,800 | |
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| Mason County | 42 | 9 | 13 | 3.4 | 2,939 | |
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| Massac County | 28 | 8 | 5 | 3.7 | 3,049 | |
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| McDonough County | 39 | 9 | 10 | 3.5 | 5,199 | |
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| McHenry County | 73 | 14 | 37 | 3.5 | 51,512 | |
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| McLean County | 46 | 9 | 14 | 3.5 | 25,004 | |
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| Menard County | 44 | 10 | 13 | 3.5 | 2,513 | |
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| Mercer County | 39 | 9 | 11 | 3.5 | 3,389 | |
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| Monroe County | 60 | 10 | 28 | 3.7 | 6,913 | |
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| Montgomery County | 50 | 10 | 20 | 3.5 | 6,007 | |
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| Morgan County | 42 | 9 | 13 | 3.4 | 6,897 | |
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| Moultrie County | 48 | 10 | 16 | 3.4 | 2,739 | |
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| Ogle County | 59 | 13 | 25 | 3.4 | 10,274 | |
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| Peoria County | 48 | 9 | 16 | 3.5 | 32,813 | |
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| Perry County | 42 | 8 | 16 | 3.5 | 4,185 | |
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| Piatt County | 40 | 9 | 13 | 3.4 | 3,529 | |
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| Pike County | 46 | 9 | 17 | 3.5 | 3,152 | |
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| Pope County | 38 | 9 | 11 | 3.5 | 1,084 | |
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| Pulaski County | 36 | 9 | 11 | 3.5 | 1,172 | |
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| Putnam County | 42 | 9 | 13 | 3.4 | 1,379 | |
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| Randolph County | 45 | 9 | 17 | 3.6 | 6,393 | |
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| Richland County | 42 | 9 | 11 | 3.5 | 3,234 | |
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| Rock Island County | 46 | 9 | 15 | 3.4 | 29,061 | |
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| Saline County | 33 | 8 | 8 | 3.5 | 4,996 | |
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| Sangamon County | 45 | 10 | 12 | 3.5 | 37,849 | |
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| Schuyler County | 41 | 9 | 10 | 3.5 | 1,744 | |
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| Scott County | 46 | 10 | 15 | 3.4 | 1,142 | |
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| Shelby County | 41 | 9 | 12 | 3.5 | 4,905 | |
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| St. Clair County | 68 | 12 | 34 | 3.7 | 44,007 | |
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| Stark County | 41 | 9 | 11 | 3.5 | 1,215 | |
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| Stephenson County | 51 | 10 | 21 | 3.5 | 10,671 | |
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| Tazewell County | 45 | 9 | 13 | 3.5 | 25,882 | |
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| Union County | 42 | 8 | 14 | 3.6 | 3,899 | |
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| Vermilion County | 38 | 9 | 11 | 3.4 | 14,698 | |
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| Wabash County | 36 | 9 | 8 | 3.5 | 2,509 | |
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| Warren County | 37 | 9 | 11 | 3.4 | 3,286 | |
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| Washington County | 55 | 10 | 23 | 3.6 | 2,948 | |
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| Wayne County | 40 | 9 | 11 | 3.5 | 3,510 | |
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| White County | 37 | 8 | 8 | 3.5 | 3,191 | |
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| Whiteside County | 43 | 9 | 15 | 3.5 | 11,967 | |
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| Will County | 87 | 16 | 48 | 3.5 | 102,267 | |
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| Williamson County | 30 | 8 | 10 | 3.1 | 13,136 | |
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| Winnebago County | 67 | 13 | 32 | 3.4 | 52,518 | |
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| Woodford County | 44 | 9 | 14 | 3.4 | 7,416 | |
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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.