Medicare in Massachusetts by county

Most people with Medicare

Across Massachusetts, 1,519,172 people had Medicare in July 2026, 36% of them in Medicare Advantage or another Medicare health plan. The counties with the most:

1. Middlesex County 309,528 with Medicare · 34% in Medicare Advantage · 27 Advantage plans with drug coverage
2. Worcester County 183,479 with Medicare · 44% in Medicare Advantage · 26 Advantage plans with drug coverage
3. Essex County 182,801 with Medicare · 35% in Medicare Advantage · 27 Advantage plans with drug coverage
4. Norfolk County 153,224 with Medicare · 32% in Medicare Advantage · 28 Advantage plans with drug coverage
5. Bristol County 135,358 with Medicare · 39% in Medicare Advantage · 32 Advantage plans with drug coverage
6. Plymouth County 132,740 with Medicare · 32% in Medicare Advantage · 28 Advantage plans with drug coverage
7. Suffolk County 115,350 with Medicare · 42% in Medicare Advantage · 27 Advantage plans with drug coverage
8. Hampden County 110,453 with Medicare · 45% in Medicare Advantage · 30 Advantage plans with drug coverage
9. Barnstable County 88,444 with Medicare · 24% in Medicare Advantage · 13 Advantage plans with drug coverage
10. Hampshire County 39,505 with Medicare · 30% in Medicare Advantage · 23 Advantage plans with drug coverage

All 14 counties, A to Z

• Barnstable County88,444 with Medicare · 24% in Medicare Advantage · 13 Advantage plans with drug coverage
• Berkshire County38,649 with Medicare · 17% in Medicare Advantage · 4 Advantage plans with drug coverage
• Bristol County135,358 with Medicare · 39% in Medicare Advantage · 32 Advantage plans with drug coverage
• Dukes County5,752 with Medicare · 9% in Medicare Advantage · 7 Advantage plans with drug coverage
• Essex County182,801 with Medicare · 35% in Medicare Advantage · 27 Advantage plans with drug coverage
• Franklin County21,477 with Medicare · 32% in Medicare Advantage · 17 Advantage plans with drug coverage
• Hampden County110,453 with Medicare · 45% in Medicare Advantage · 30 Advantage plans with drug coverage
• Hampshire County39,505 with Medicare · 30% in Medicare Advantage · 23 Advantage plans with drug coverage
• Middlesex County309,528 with Medicare · 34% in Medicare Advantage · 27 Advantage plans with drug coverage
• Nantucket County2,411 with Medicare · 7% in Medicare Advantage · 3 Advantage plans with drug coverage
• Norfolk County153,224 with Medicare · 32% in Medicare Advantage · 28 Advantage plans with drug coverage
• Plymouth County132,740 with Medicare · 32% in Medicare Advantage · 28 Advantage plans with drug coverage
• Suffolk County115,350 with Medicare · 42% in Medicare Advantage · 27 Advantage plans with drug coverage
• Worcester County183,479 with Medicare · 44% in Medicare Advantage · 26 Advantage plans with drug coverage

Sources: CMS Medicare Monthly Enrollment, July 2026, and the CMS 2027 plan landscape. Medicare Advantage here includes other Medicare health plans, such as cost plans and PACE. Before you meet any agent, check their Massachusetts license.

Keep reading

• How to find a good Medicare agent near youWhere to look for a local Medicare agent, how to narrow the list to one or two, and the five-minute checks to do before you share anything.
• Medicare Open Enrollment checklist: what to check before December 7A step-by-step checklist for the October 15 to December 7, 2026 Open Enrollment Period: what to read in your plan's letter, what's changing for 2027, what you can switch, and what happens if you do nothing.
• Moving to another state with Medicare: what changes and what to doOriginal Medicare moves with you; most Medicare Advantage and drug plans don't. What happens to each kind of coverage when you move, your window to switch, and why your agent must be licensed in your new state.