2026 Cases
Total confirmed measles cases in WA: 6
Age:
Under 5 years: 3 (50%)
5-17 years: 2 (33%)
18+ years: 1 (17%)
2025 Cases
Total confirmed measles cases in WA: 12
Age:
Under 5 years: 5 (42%)
5-17 years: 1 (8%)
18+ years: 6 (50%)
Data Notes: All data are preliminary and subject to change. Data reported since January 1, 2025. For previous year's data, see Annual Communicable Disease Reports.
Latest News
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
December 27, 2025 - January 1, 2026 - Measles Cases in Visitors to Snohomish and King Counties: Multiple Locations of Possible Exposure
Measles Public Exposure Location Map
Public Measles Exposure Location in Washington State Map - Check to see if you might have been exposed to measles at a public location in Washington State.
County Media Releases
Washington Measles Cases
- January 20, 2026 - Provider Health Alert: Verifying Measles Immunity Status & Interim Expedited MMR Guidelines, Snohomish County
- January 16, 2026 - Confirmed Case of Measles in Kittitas County
- January 15, 2026 - Measles Outbreak Declared in Snohomish County After 3 New Cases
- October 28, 2025. King County case, linked to a confirmed case in a traveler from out of state. Public Health – Seattle & King County media release with potential exposures locations.
- August 25, 2025. Spokane County case. Spokane Regional Health District media release with potential exposure locations
- June 25, 2025. Two King County cases. Public Health - Seattle & King County media release with potential exposure locations
- June 20, 2025. Two Whatcom County cases. Whatcom County Health and Community Services media release for lab confirmed case and media release about second case and potential exposure locations
- May 20, 2025. King County case. Public Health - Seattle & King County media release with potential exposure locations
- April 20, 2025. King County case. Public Health - Seattle & King County media release with potential exposure locations
- April 4, 2025. King County case. Public Health - Seattle & King County media release with potential exposure locations
- April 1, 2025. Snohomish County case. Snohomish County Public Health media release with potential exposure locations and Public Health - Seattle & King County media release with potential exposure locations
- March 17, 2025. Snohomish County case. Snohomish County Health Department media release with potential exposure locations and Public Health - Seattle & King County media release with potential exposure locations
- February 26, 2025. King County case. Public Health - Seattle and King County media release with potential exposure locations
Additional Potential Exposure Locations in Washington
- December 27, 2025 – January 1, 2026. SeaTac Airport and multiple locations in King and Snohomish counties. Snohomish County Health Department media release with potential exposure locations
- November 11 and 17, 2025. SeaTac Airport. Public Health – Seattle & King County Measles website with information on potential exposure locations
- October 13, 2025. SeaTac Airport. Public Health – Seattle & King County Measles media release with potential exposure locations
- August 12, 13, and 15, 2025. Providence Sacred Heart Emergency Department and Pediatric Oncology and Hematology Clinic. Spokane Regional Health District media release with potential exposure locations
- April 30 – May 3, 2025. SeaTac Airport and multiple locations in King and Snohomish counties. Public Health – Seattle & King County media release with potential exposure locations and Snohomish County Health Department media release with potential exposure locations
- April 6 -7, 2025. SeaTac Airport and Tukwila hotel. Public Health – Seattle & King County media release with potential exposure locations
- Jan 10, 2025. SeaTac Airport. Public Health – Seattle & King County media release with potential exposure locations
More Resources
Interim Pediatric Measles Outbreak Vaccination Recommendations (PDF)
Measles Notifiable Conditions - Measles reporting and testing resources for healthcare providers.
Measles Cases and Outbreaks, CDC - Measles cases reported in the United States.