Last updated: February 3, 2026 at 5:00 pm
Measles is a vaccine-preventable disease that can spread very easily between people who are not immune to the disease. Cases of measles are rising across the U.S. and in many countries around the world. We are tracking measles cases and outbreaks in Washington state. All data are preliminary and subject to change.
2026 Measles Cases and Outbreaks
| Number of Cases | Percent of Cases | |
|---|---|---|
| Total Measles Cases in Washington | 10 | 100% |
| Measles Cases linked to a WA Outbreak* | 7 | 70% |
| Measles Cases not linked to a WA Outbreak** | 3 | 30% |
| Case confirmed, under investigation | 0 | 0% |
| Hospitalizations | 0 | 0% |
| Deaths | 0 | 0% |
*A Measles Outbreak is declared when 3 or more measles cases are related.
A WA Outbreak is a measles outbreak happening in the State of Washington.
** Cases not linked to a WA Outbreak are cases of measles in Washington that are linked to other cases of measles outside of Washington State.
2026 Measles Cases by County of Residence
| County of Residence | Number of Cases | Percent of Total Cases |
|---|---|---|
| Snohomish | 7 | 70% |
| Clark | 1 | 10% |
| Kittitas | 1 | 10% |
| Stevens | 1 | 10% |
| Total Measles Cases | 10 | 100% |
2026 Measles Cases by Age
| Age Range | Number of Cases | Percent of Total Cases |
|---|---|---|
| Under 5 years | 3 | 30% |
| 5-17 years | 4 | 40% |
| 18+ years | 3 | 30% |
2026 Measles Cases by Vaccination Status
| Vaccine Status | Number of Cases | Percent of Total Cases |
|---|---|---|
| Unvaccinated | 9 | 90% |
| 1 dose of measles-containing vaccine*** | 0 | 0% |
| ≥2 doses of measles-containing vaccine | 0 | 0% |
| Unknown | 1 | 10% |
***Measles-containing vaccines include MMR (Measles, Mumps, Rubella), MMRV (Measles, Mumps, Rubella, Varicella), and others.
Measles Public Exposure Location Map
Public Measles Exposure Locations in Washington State Map – These are public locations in Washington state where people confirmed to have measles visited while they were likely contagious for measles. Check this map to see if you might have been exposed to measles at a public location in Washington state.
News Releases and Alerts
| Date | Title |
|---|---|
| January 28, 2026 | Snohomish County Confirms Three New Measles Cases |
| January 23, 2026 | Public Health investigating confirmed measles case in Clark County |
| January 20, 2026 | Provider Health Alert: Verifying Measles Immunity Status & Interim Expedited MMR Guidelines, Snohomish County |
| January 16, 2026 | Washington confirms its first measles outbreak since 2023 |
| January 16, 2026 | Confirmed Case of Measles in Kittitas County |
| January 15, 2026 | Measles Outbreak Declared in Snohomish County After 3 New Cases |
| January 8, 2026 | Measles Cases in Visitors to Snohomish and King Counties: Multiple Locations of Possible Exposure |
- 2025 Washington Measles Cases
-
In 2025, there were 12 cases of measles confirmed in Washington state. Last year, no cases of measles were linked to a Washington measles outbreak. All cases were related to travel outside of our state.
Age Number of Cases <5 years 5 5–17 years 1 ≥18 years 6 Total Measles Cases in Washington, 2025 12 For measles data from 2024 and earlier, see our Annual Communicable Disease Reports.
More Resources
For the Public
Measles - General information about measles and Washington state resources.
Measles Cases and Outbreaks, CDC - Measles cases reported in the United States.
For Healthcare Providers
Measles - Notifiable Condition - Measles reporting and testing resources for healthcare providers and public health partners.
Measles Provider Evaluation Worksheet (PDF) - Fillable worksheet for providers to use when assessing a patient with suspected measles.
Interim Pediatric Measles Outbreak Vaccination Recommendations (PDF) - Interim pediatric measles vaccination guidance from WA DOH.