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Measles in the United States

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Measles cases in Wisconsin

243 cases in the past 6 months.

Data as of Oct 3, 2026.

Wisconsin has recorded 243 measles cases in the past six months. Figures are compiled from state and local health departments, the CDC, and local news, and update automatically as new reports come in.

Choropleth map shaded by number of measles cases reported in the past six months.

Cases (past 6 months)

  • No reports
  • 1-4
  • 5-9
  • 10-24
  • 25-49
  • 50-99
  • 100+

Counties

News in Wisconsin

Wisconsin

Wisconsin measles outbreak reaches 243 cases across 8 counties

Wisconsin health officials reported 243 measles cases in 2026 as of October 2, with 29 added in a single day. Cases span eight counties, led by Lafayette (86), Iowa (74) and Grant (56). Local health staff say the confirmed count likely undercounts the true number of infections.

Sources:Milwaukee Journal Sentinel: Wisconsin measles cases up to 243, and that could be an undercountCIDRAP: Measles milestones: US closes in on 4,000 cases as Pennsylvania nears 1,000

Measles cases in other states