Maryland Medicare numbers by county
Medicare Advantage and Part D plans are offered county by county, so the plans open to you depend on where you live. Pick your county to see local figures and free help in your area.
| County | Residents 65+ | People with Medicare | Medicare Advantage share |
|---|---|---|---|
| Allegany County | 14,393 | 17,352 | 18.8% |
| Anne Arundel County | 97,887 | 111,780 | 19.8% |
| Baltimore City | 89,474 | 102,992 | 36.8% |
| Baltimore County | 157,919 | 177,228 | 25.8% |
| Calvert County | 16,037 | 19,514 | 18.3% |
| Caroline County | 5,995 | 7,695 | 23.7% |
| Carroll County | 32,310 | 38,751 | 20.5% |
| Cecil County | 18,651 | 22,282 | 21.8% |
| Charles County | 24,347 | 30,102 | 25.0% |
| Dorchester County | 7,760 | 9,138 | 26.2% |
| Frederick County | 45,824 | 53,809 | 20.3% |
| Garrett County | 7,163 | 8,060 | 22.1% |
| Harford County | 47,686 | 57,629 | 24.8% |
| Howard County | 53,280 | 59,539 | 19.3% |
| Kent County | 5,519 | 6,192 | 18.3% |
| Montgomery County | 187,319 | 199,446 | 22.5% |
| Prince George's County | 148,087 | 158,262 | 30.9% |
| Queen Anne's County | 11,200 | 13,726 | 17.1% |
| Somerset County | 4,555 | 5,521 | 30.4% |
| St. Mary's County | 16,904 | 20,602 | 16.9% |
| Talbot County | 11,522 | 12,489 | 15.8% |
| Washington County | 28,617 | 34,436 | 24.1% |
| Wicomico County | 18,040 | 22,164 | 27.3% |
| Worcester County | 15,895 | 17,513 | 25.1% |
Sources: U.S. Census Bureau 2023 population estimates; CMS Medicare Advantage State/County Penetration, September 2026. Medicare Advantage share = people enrolled in a Medicare Advantage plan divided by people with Medicare. “n/a” means CMS does not publish a figure for very small counties.
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