Wisconsin Measles Cases in 2026
Last updated:
Is there a measles outbreak in Wisconsin? This page tracks confirmed measles cases in Wisconsin for 2026, updated weekly with data from the Johns Hopkins Measles Tracking project. See how Wisconsin compares to other states and check local MMR vaccination rates.
confirmed in Wisconsin in 2026
As of 2026-04-03
Key Takeaways
- 1 Wisconsin has reported 2 confirmed measles cases so far in 2026.
- 2 Oconto has the most cases with 13 confirmed.
- 3 Nearby states Minnesota, Illinois, Michigan have also reported cases.
CDC Recommendations at This Level
Measles cases reported — check your MMR vaccination
- • Verify that you and your children have received 2 doses of MMR vaccine
- • If you're not vaccinated, talk to your doctor about getting vaccinated now
- • Watch for symptoms: high fever, cough, runny nose, red eyes, followed by a rash 3-5 days later
- • If exposed, contact your doctor — post-exposure vaccination within 72 hours may prevent illness
This is general public health guidance based on CDC recommendations — not personal medical advice. Talk to your healthcare provider about what's right for you and your family.
County Breakdown — Wisconsin
| County | Cases | Last Report |
|---|---|---|
| Oconto | 13 | 2025-09-07 |
| Dane | 1 | 2026-01-25 |
| Waukesha | 1 | 2026-01-18 |
County-level data from JHU Measles Tracking Team. Some counties may have additional unreported cases.
MMR Vaccination Coverage in Wisconsin
Kindergarten MMR coverage in Wisconsin is 84.8% — below the 95% herd immunity threshold needed to prevent measles outbreaks.
View Wisconsin MMR coverage details →Nearby States
Sources & Methods
Measles case counts are compiled by the JHU Measles Tracking Team from state and local health department reports. County-level data may be incomplete. The CDC also publishes national measles case counts. Learn more about our methods .
More Health Data for Wisconsin
Cities in Wisconsin
Health data available for these Wisconsin cities:
Frequently Asked Questions
How many measles cases has Wisconsin had in 2026?
Wisconsin has reported 2 confirmed measles cases in 2026 as of the most recent data update. This count may change as new cases are confirmed or reclassified.
Is there a measles outbreak in Wisconsin?
Based on the latest data, Wisconsin does not have any active measles outbreaks reported. However, individual cases may still occur.
What is the MMR vaccine and why does coverage matter?
The MMR vaccine protects against measles, mumps, and rubella. Measles is highly contagious and requires approximately 95% community vaccination coverage to achieve "herd immunity" — the threshold at which enough people are immune to prevent sustained transmission. View Wisconsin MMR coverage data .
Local Health Signal is not affiliated with the CDC or any government agency. Data is provided for informational purposes only and is not intended for clinical decision making. See our methods page for details on data sources and limitations.