Developing Story Note: This report covers new developments in Wisconsin's 2026 measles cases, including spread beyond the original southwest outbreak counties. Information may change as health officials release new data. Figures are from the Wisconsin Department of Health Services (DHS) update of September 25, 2026.
Wisconsin has confirmed 192 measles cases so far in 2026, and the virus is no longer confined to the southwest corner of the state. DHS reported 21 new cases on Friday, September 25, up from 171 as of September 22. Marathon County, home to Wausau, now has three confirmed cases, and Chippewa County has one. DHS says all four are linked to out-of-state travel.
