Washington Measles Cases in 2026
Last updated:
in the JHU state tracker’s 2026 view
Latest state report date 2026-08-26
Multiple measles cases have been reported. Check local health guidance for outbreak-specific instructions.
Key Takeaways
- 1The JHU state tracker currently lists 22 measles cases for Washington in its 2026 view.
- 2Use local health department guidance for outbreak-specific instructions, school decisions, and exposure follow-up.
- 3Washington's kindergarten MMR coverage is 90.9%, which sits below the 95% herd-immunity threshold.
- 4Recent 2026 county-level reports are listed below when public case detail is available.
- 5The current JHU tracker views for nearby states Oregon, Idaho also include cases.
Practical Steps for This Signal
Higher measles case signal — check official local guidance
- •The CDC strongly recommends MMR vaccination for anyone who is not up to date
- •Measles is extremely contagious — it spreads through the air and can linger in a room for 2 hours after an infected person leaves
- •If you develop symptoms, call your doctor BEFORE going in — they need to prepare to avoid exposing others
- •Use state and local health-department notices to identify confirmed exposure locations or formal outbreak guidance
- •Ask a healthcare provider about precautions for infants too young for routine MMR vaccination
These general steps pair Local Health Signal's interpretation of the reported public-health signal with CDC prevention guidance. They are not a personal risk assessment or 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
Latest dated state report: Aug 26, 2026
Coverage
State and county case tracking compiled from public health reports
Best For
Monitoring compiled state and county case reports
JHU’s county rows are cumulative. Local Health Signal assigns a county total to the 2026 view when that county’s latest report is dated in 2026, so this state total is an approximate year view rather than an official 2026 state count. It can lag local-health-department announcements and must not be read as a formal outbreak declaration. Check local guidance for urgent exposure decisions.
County Breakdown — Washington
| County | Cases | Last Report |
|---|---|---|
| Clark | 7 | 2026-08-26 |
| Snohomish | 3 | 2026-02-26 |
| Walla Walla | 3 | 2026-05-20 |
| Grant | 2 | 2026-03-18 |
| King | 2 | 2026-04-10 |
| Kittitas | 2 | 2026-04-29 |
| Stevens | 2 | 2026-02-13 |
| Spokane | 1 | 2026-03-27 |
County-level data from JHU Measles Tracking Team, limited here to reports dated in 2026. Some counties may have additional unreported cases.
MMR Vaccination Coverage in Washington
Kindergarten MMR coverage in Washington is 90.9% — below the 95% herd immunity threshold needed to prevent measles outbreaks.
View Washington MMR coverage details →Nearby States
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 Washington
Best Next Clicks for Washington
Useful next questions
Questions worth opening from the Washington measles page
Use these pages when you need outbreak context, help interpreting a low case count, or measles information for travel.
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 Washington
Health data available for these Washington cities:
Frequently Asked Questions
How many measles cases has Washington had in 2026?
The JHU state tracker currently lists 22 measles cases for Washington in its 2026 view. This count may change as new cases are confirmed or reclassified.
Is there a measles outbreak in Washington?
The JHU tracker assigns multiple measles cases to Washington's approximate 2026 view, but this page does not determine formal outbreak status. 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.
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.