Medicare in Delaware by county

Most people with Medicare

Across Delaware, 258,904 people had Medicare in July 2026, 33% of them in Medicare Advantage or another Medicare health plan. The counties with the most:

1. New Castle County 117,476 with Medicare · 34% in Medicare Advantage · 19 Advantage plans with drug coverage
2. Sussex County 96,876 with Medicare · 30% in Medicare Advantage · 13 Advantage plans with drug coverage
3. Kent County 44,551 with Medicare · 35% in Medicare Advantage · 12 Advantage plans with drug coverage

All 3 counties, A to Z

• Kent County44,551 with Medicare · 35% in Medicare Advantage · 12 Advantage plans with drug coverage
• New Castle County117,476 with Medicare · 34% in Medicare Advantage · 19 Advantage plans with drug coverage
• Sussex County96,876 with Medicare · 30% in Medicare Advantage · 13 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 Delaware 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.