Measles Cases by County in Pennsylvania in 2026

Pennsylvania has reported 792 cases of measles in Pennsylvania in 2026, and four deaths. This is among the largest outbreaks in the country this year and the most deadly in the U.S. since 1992.

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Data last updated: Sept 21, 2026. Community transmission means the virus is being transmitted openly from person-to-person.

Chart: Stephen Stirling / StaffSource: Pennsylvania Department of Health