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4,599 cases reported in the past 6 months across 41 states.
Data as of Oct 13, 2026.
This map tracks measles cases across the United States over the past six months. Select any state for its current case count, a county-level map, and the latest news. Figures are compiled from state and local health departments, the CDC, and local news, and update automatically as new reports come in.
Cases (past 6 months)
The Maryland Department of Health has reported 56 measles cases in 2026 as of Oct. 8, up from just three in all of 2025. The state declared an outbreak Aug. 24 in St. Mary's, Carroll and Cecil counties.
Kentucky's 2026 measles total reached 104, the state's highest since 1991, after the Laurel County Health Department confirmed seven cases on Oct. 9 in a new southeastern cluster far from the western outbreak counties. Christian County leads with 44 cases, and 102 of the 104 patients were unvaccinated. Note: WEKU reported Trigg County at 25 cases while other outlets citing the state dashboard report 23.
The Indiana Department of Health reports 34 known measles cases in 2026 as of Oct. 13, up from 30 on Oct. 9. Allen and DeKalb counties each rose to 2 cases and LaGrange County to 5; Wayne County leads with 8. The department notes the data are provisional and updated on weekdays.
Chester County has reported 87 measles cases in 2026 as of Oct. 9, the third-highest county total in Pennsylvania and the only county in the Philadelphia region with known active spread. Oxford Area High School closed Oct. 9 after a case in the school community, with unvaccinated students and staff facing 21-day quarantine, and the county health department warned of possible exposures at two CVS pharmacies and a Giant supermarket on Oct. 4.
The Franklin County coroner announced Oct. 12 that a 39-year-old unvaccinated woman died Oct. 10 of a probable acute cardiac event from possible measles complications. The Pennsylvania Department of Health said it is conducting a thorough review and has not confirmed the death as measles-associated; five measles-associated deaths in the state have been confirmed to date.