Medicare in Arizona by county

Most people with Medicare

Across Arizona, 1,563,324 people had Medicare in July 2026, 51% of them in Medicare Advantage or another Medicare health plan. The counties with the most:

1. Maricopa County 817,680 with Medicare · 51% in Medicare Advantage · 45 Advantage plans with drug coverage
2. Pima County 263,434 with Medicare · 57% in Medicare Advantage · 45 Advantage plans with drug coverage
3. Pinal County 108,477 with Medicare · 57% in Medicare Advantage · 41 Advantage plans with drug coverage
4. Yavapai County 96,583 with Medicare · 42% in Medicare Advantage · 16 Advantage plans with drug coverage
5. Mohave County 78,301 with Medicare · 53% in Medicare Advantage · 9 Advantage plans with drug coverage
6. Yuma County 46,553 with Medicare · 52% in Medicare Advantage · 13 Advantage plans with drug coverage
7. Cochise County 38,165 with Medicare · 48% in Medicare Advantage · 11 Advantage plans with drug coverage
8. Navajo County 28,492 with Medicare · 39% in Medicare Advantage · 5 Advantage plans with drug coverage
9. Coconino County 24,810 with Medicare · 33% in Medicare Advantage · 9 Advantage plans with drug coverage
10. Gila County 18,280 with Medicare · 42% in Medicare Advantage · 6 Advantage plans with drug coverage

All 15 counties, A to Z

• Apache County15,638 with Medicare · 30% in Medicare Advantage · 4 Advantage plans with drug coverage
• Cochise County38,165 with Medicare · 48% in Medicare Advantage · 11 Advantage plans with drug coverage
• Coconino County24,810 with Medicare · 33% in Medicare Advantage · 9 Advantage plans with drug coverage
• Gila County18,280 with Medicare · 42% in Medicare Advantage · 6 Advantage plans with drug coverage
• Graham County6,478 with Medicare · 56% in Medicare Advantage · 14 Advantage plans with drug coverage
• Greenlee County1,333 with Medicare · 55% in Medicare Advantage · 5 Advantage plans with drug coverage
• La Paz County6,735 with Medicare · 47% in Medicare Advantage · 11 Advantage plans with drug coverage
• Maricopa County817,680 with Medicare · 51% in Medicare Advantage · 45 Advantage plans with drug coverage
• Mohave County78,301 with Medicare · 53% in Medicare Advantage · 9 Advantage plans with drug coverage
• Navajo County28,492 with Medicare · 39% in Medicare Advantage · 5 Advantage plans with drug coverage
• Pima County263,434 with Medicare · 57% in Medicare Advantage · 45 Advantage plans with drug coverage
• Pinal County108,477 with Medicare · 57% in Medicare Advantage · 41 Advantage plans with drug coverage
• Santa Cruz County12,365 with Medicare · 67% in Medicare Advantage · 13 Advantage plans with drug coverage
• Yavapai County96,583 with Medicare · 42% in Medicare Advantage · 16 Advantage plans with drug coverage
• Yuma County46,553 with Medicare · 52% 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 Arizona 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.