Montana Measles Cases in 2026
Last updated:
confirmed in Montana in 2026
As of 2026-05-29
Multiple measles cases have been reported. Check local health guidance for outbreak-specific instructions.
Key Takeaways
- 1 Montana has reported 3 measles cases in 2026.
- 2 Use local health department guidance for outbreak-specific instructions, school decisions, and exposure follow-up.
- 3 Use the Montana MMR coverage page for vaccination context and outbreak readiness.
- 4 Recent 2026 county-level reports are listed below when public case detail is available.
- 5 Nearby states North Dakota, South Dakota, Wyoming have also reported cases in 2026.
CDC Recommendations at This Level
Measles cases reported — check your MMR vaccination
- • Verify that you and your children have received 2 doses of MMR vaccine
- • If you're not vaccinated, talk to your doctor about getting vaccinated now
- • Watch for symptoms: high fever, cough, runny nose, red eyes, followed by a rash 3-5 days later
- • If exposed, contact your doctor — post-exposure vaccination within 72 hours may prevent illness
This is general public health guidance based on CDC recommendations — not personal medical advice. Talk to your healthcare provider about what's right for you and your family.
Source and context
How this page is built
Source
Updated
May 29, 2026
Coverage
State and county case tracking compiled from public health reports
Best For
Monitoring outbreak geography and confirmed case totals
Measles case counts can lag local-health-department announcements and may be revised as reports are confirmed. Use this page for situational awareness, then check local health guidance for urgent exposure decisions.
County Breakdown — Montana
| County | Cases | Last Report |
|---|---|---|
| Lewis and Clark | 3 | 2026-03-22 |
County-level data from JHU Measles Tracking Team, limited here to reports dated in 2026. Some counties may have additional unreported cases.
Nearby States
| State | Cases (2026) |
|---|---|
| 19 | |
| 7 | |
| 5 | |
| 4 |
Sources & Methods
Measles case counts are compiled by the JHU Measles Tracking Team from state and local health department reports. County-level data may be incomplete. The CDC also publishes national measles case counts. Learn more about our methods .
More Health Data for Montana
Best Next Clicks for Montana
Useful next questions
Questions worth opening from the Montana measles page
These are the best next clicks when someone lands here from search and needs outbreak context, low-count interpretation, or a travel-facing measles answer.
Local Measles Question
Is There a Measles Outbreak Near Me?
A local measles routing page for outbreak and exposure searches, with a built-in measles finder and direct next clicks into state and travel pages.
Measles Interpretation
Should I Worry About a Single Measles Case in My State?
A trust-preserving measles interpretation page that helps users react proportionately and click into the right state page next.
Travel Question
Is Measles a Travel Risk Right Now?
A travel-focused measles page that tells users when measles belongs in the pre-trip checklist and where to click next.
Cities in Montana
Health data available for these Montana cities:
Frequently Asked Questions
How many measles cases has Montana had in 2026?
Montana has reported 3 measles cases in 2026. This count may change as new cases are confirmed or reclassified.
Is there a measles outbreak in Montana?
Montana has multiple reported measles cases in 2026, but this page tracks case totals rather than formal outbreak declarations. Check your local health department for outbreak-specific guidance and exposure notices.
What is the MMR vaccine and why does coverage matter?
The MMR vaccine protects against measles, mumps, and rubella. Measles is highly contagious and requires approximately 95% community vaccination coverage to achieve "herd immunity" — the threshold at which enough people are immune to prevent sustained transmission. View Montana MMR coverage data .
Local Health Signal is not affiliated with the CDC or any government agency. Data is provided for informational purposes only and is not intended for clinical decision making. See our methods page for details on data sources and limitations.