Medicare in Montana by county

Most people with Medicare

Across Montana, 273,047 people had Medicare in July 2026, 30% of them in Medicare Advantage or another Medicare health plan. The counties with the most:

1. Yellowstone County 37,957 with Medicare · 38% in Medicare Advantage · 9 Advantage plans with drug coverage
2. Flathead County 29,217 with Medicare · 35% in Medicare Advantage · 10 Advantage plans with drug coverage
3. Missoula County 26,285 with Medicare · 26% in Medicare Advantage · 8 Advantage plans with drug coverage
4. Gallatin County 20,422 with Medicare · 27% in Medicare Advantage · 7 Advantage plans with drug coverage
5. Cascade County 19,743 with Medicare · 38% in Medicare Advantage · 10 Advantage plans with drug coverage
6. Lewis and Clark County 18,647 with Medicare · 30% in Medicare Advantage · 9 Advantage plans with drug coverage
7. Ravalli County 15,655 with Medicare · 32% in Medicare Advantage · 5 Advantage plans with drug coverage
8. Lake County 9,033 with Medicare · 28% in Medicare Advantage · 2 Advantage plans with drug coverage
9. Silver Bow County 8,836 with Medicare · 30% in Medicare Advantage · 5 Advantage plans with drug coverage
10. Lincoln County 8,395 with Medicare · 42% in Medicare Advantage · 5 Advantage plans with drug coverage

All 56 counties, A to Z

• Beaverhead County2,706 with Medicare · 23% in Medicare Advantage · 2 Advantage plans with drug coverage
• Big Horn County2,099 with Medicare · 32% in Medicare Advantage · 3 Advantage plans with drug coverage
• Blaine County1,279 with Medicare · 2% in Medicare Advantage · no Advantage plans listed
• Broadwater County1,924 with Medicare · 31% in Medicare Advantage · 4 Advantage plans with drug coverage
• Carbon County3,566 with Medicare · 32% in Medicare Advantage · 4 Advantage plans with drug coverage
• Carter County366 with Medicare · no Advantage plans listed
• Cascade County19,743 with Medicare · 38% in Medicare Advantage · 10 Advantage plans with drug coverage
• Chouteau County1,518 with Medicare · 27% in Medicare Advantage · 4 Advantage plans with drug coverage
• Custer County2,951 with Medicare · 14% in Medicare Advantage · no Advantage plans listed
• Daniels County473 with Medicare · 5% in Medicare Advantage · 1 Advantage plans with drug coverage
• Dawson County2,235 with Medicare · 2% in Medicare Advantage · no Advantage plans listed
• Deer Lodge County3,051 with Medicare · 26% in Medicare Advantage · 4 Advantage plans with drug coverage
• Fallon County659 with Medicare · 6% in Medicare Advantage · 1 Advantage plans with drug coverage
• Fergus County3,511 with Medicare · 34% in Medicare Advantage · 3 Advantage plans with drug coverage
• Flathead County29,217 with Medicare · 35% in Medicare Advantage · 10 Advantage plans with drug coverage
• Gallatin County20,422 with Medicare · 27% in Medicare Advantage · 7 Advantage plans with drug coverage
• Garfield County311 with Medicare · 1 Advantage plans with drug coverage
• Glacier County2,307 with Medicare · 21% in Medicare Advantage · 3 Advantage plans with drug coverage
• Golden Valley County304 with Medicare · 44% in Medicare Advantage · 3 Advantage plans with drug coverage
• Granite County1,030 with Medicare · 25% in Medicare Advantage · 3 Advantage plans with drug coverage
• Hill County3,408 with Medicare · 8% in Medicare Advantage · no Advantage plans listed
• Jefferson County3,948 with Medicare · 29% in Medicare Advantage · 5 Advantage plans with drug coverage
• Judith Basin County704 with Medicare · 36% in Medicare Advantage · 4 Advantage plans with drug coverage
• Lake County9,033 with Medicare · 28% in Medicare Advantage · 2 Advantage plans with drug coverage
• Lewis and Clark County18,647 with Medicare · 30% in Medicare Advantage · 9 Advantage plans with drug coverage
• Liberty County513 with Medicare · 20% in Medicare Advantage · 3 Advantage plans with drug coverage
• Lincoln County8,395 with Medicare · 42% in Medicare Advantage · 5 Advantage plans with drug coverage
• Madison County2,907 with Medicare · 22% in Medicare Advantage · 3 Advantage plans with drug coverage
• McCone County485 with Medicare · 7% in Medicare Advantage · no Advantage plans listed
• Meagher County647 with Medicare · 18% in Medicare Advantage · 3 Advantage plans with drug coverage
• Mineral County1,793 with Medicare · 34% in Medicare Advantage · 3 Advantage plans with drug coverage
• Missoula County26,285 with Medicare · 26% in Medicare Advantage · 8 Advantage plans with drug coverage
• Musselshell County1,745 with Medicare · 36% in Medicare Advantage · 3 Advantage plans with drug coverage
• Park County4,858 with Medicare · 19% in Medicare Advantage · 4 Advantage plans with drug coverage
• Petroleum County119 with Medicare · 15% in Medicare Advantage · 1 Advantage plans with drug coverage
• Phillips County1,156 with Medicare · 8% in Medicare Advantage · 1 Advantage plans with drug coverage
• Pondera County1,566 with Medicare · 29% in Medicare Advantage · 5 Advantage plans with drug coverage
• Powder River County466 with Medicare · 7% in Medicare Advantage · 1 Advantage plans with drug coverage
• Powell County1,839 with Medicare · 21% in Medicare Advantage · 4 Advantage plans with drug coverage
• Prairie County433 with Medicare · 8% in Medicare Advantage · 1 Advantage plans with drug coverage
• Ravalli County15,655 with Medicare · 32% in Medicare Advantage · 5 Advantage plans with drug coverage
• Richland County2,332 with Medicare · 1% in Medicare Advantage · no Advantage plans listed
• Roosevelt County1,788 with Medicare · 5% in Medicare Advantage · 1 Advantage plans with drug coverage
• Rosebud County1,955 with Medicare · 25% in Medicare Advantage · 4 Advantage plans with drug coverage
• Sanders County5,054 with Medicare · 34% in Medicare Advantage · 5 Advantage plans with drug coverage
• Sheridan County992 with Medicare · no Advantage plans listed
• Silver Bow County8,836 with Medicare · 30% in Medicare Advantage · 5 Advantage plans with drug coverage
• Stillwater County2,874 with Medicare · 35% in Medicare Advantage · 4 Advantage plans with drug coverage
• Sweet Grass County1,113 with Medicare · 28% in Medicare Advantage · 2 Advantage plans with drug coverage
• Teton County1,756 with Medicare · 39% in Medicare Advantage · 6 Advantage plans with drug coverage
• Toole County1,078 with Medicare · 18% in Medicare Advantage · 3 Advantage plans with drug coverage
• Treasure County242 with Medicare · 36% in Medicare Advantage · 3 Advantage plans with drug coverage
• Valley County1,909 with Medicare · 7% in Medicare Advantage · 1 Advantage plans with drug coverage
• Wheatland County643 with Medicare · 36% in Medicare Advantage · 2 Advantage plans with drug coverage
• Wibaux County244 with Medicare · no Advantage plans listed
• Yellowstone County37,957 with Medicare · 38% in Medicare Advantage · 9 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 Montana 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.