Measles Cases Across the United States
Last updated:
This measles tracker is built for the question people actually ask first: “is there an outbreak where I live or where I’m going?” It gives a fast national answer, highlights the states driving the outbreak, and routes you into state and county detail when you need more than a headline.
Start with the right measles answer
If you are checking exposure risk, open your state page first. If you are checking prevention context, compare your state's MMR vaccination coverage. This hub is best for the national outbreak picture.
812 confirmed measles cases in 37 states in 2026.
Measles cases have been reported in 37 states so far in 2026.
Source and context
How to read this measles tracker
Source
Updated
2026-05-29
Coverage
National, state, and county-level compiled reports
Best For
Fast outbreak orientation and state-to-county drill-down
Use this hub for the national outbreak picture and the states currently carrying the most cases. Because measles is often tracked through state and local reports, timing can vary slightly across sources, and the state pages are where we add the most local context.
States Driving The 2026 Outbreak
Highest current case totals
South Carolina
State measles page
182 cases in 2026.
Texas
State measles page
158 cases in 2026.
Utah
State measles page
121 cases in 2026.
Florida
State measles page
67 cases in 2026.
Virginia
State measles page
33 cases in 2026.
Arizona
State measles page
30 cases in 2026.
Cases by State
States with Multiple Reported Cases
All States
| State | Risk Level | Cases (2026) |
|---|---|---|
| South Carolina | High | 182 |
| Texas | High | 158 |
| Utah | High | 121 |
| Florida | High | 67 |
| Virginia | High | 33 |
| Arizona | High | 30 |
| Pennsylvania | High | 25 |
| California | High | 24 |
| Washington | High | 21 |
| North Dakota | High | 19 |
| Colorado | High | 16 |
| North Carolina | High | 13 |
| New Mexico | High | 12 |
| Oregon | Moderate | 9 |
| Michigan | Moderate | 8 |
| New York | Moderate | 8 |
| Oklahoma | Moderate | 7 |
| South Dakota | Moderate | 7 |
| Georgia | Moderate | 5 |
| Minnesota | Moderate | 5 |
| Ohio | Moderate | 5 |
| Wyoming | Moderate | 5 |
| Idaho | Moderate | 4 |
| Maine | Moderate | 4 |
| Illinois | Moderate | 3 |
| Kentucky | Moderate | 3 |
| Montana | Moderate | 3 |
| Nebraska | Moderate | 3 |
| Maryland | Low | 2 |
| Massachusetts | Low | 2 |
| Wisconsin | Low | 2 |
| Hawaii | Low | 1 |
| Louisiana | Low | 1 |
| Missouri | Low | 1 |
| New Jersey | Low | 1 |
| Rhode Island | Low | 1 |
| Vermont | Low | 1 |
| Alabama | Low | 0 |
| Alaska | Low | 0 |
| Arkansas | Low | 0 |
| Connecticut | Low | 0 |
| Delaware | Low | 0 |
| District of Columbia | Low | 0 |
| Indiana | Low | 0 |
| Iowa | Low | 0 |
| Kansas | Low | 0 |
| Mississippi | Low | 0 |
| Nevada | Low | 0 |
| New Hampshire | Low | 0 |
| Tennessee | Low | 0 |
| West Virginia | Low | 0 |
Measles Prevention: MMR Vaccination Coverage
Measles is preventable with the MMR vaccine. Communities need at least 95% coverage for herd immunity. See which states are above and below this threshold.
View MMR coverage by state →Measles Insights
Sources & Methods
Measles case data is compiled by the JHU Measles Tracking Team from state and local health department reports. Case counts may differ slightly from CDC totals due to reporting timing. County-level data is available on state pages. Learn more about our methods .
Frequently Asked Questions
How many measles cases have there been in the U.S. in 2026?
As of the latest data update, there have been 812 confirmed measles cases across 37 states in 2026.
Is there a measles outbreak in the United States in 2026?
Yes. The United States is experiencing a significant measles outbreak in 2026, with 812 confirmed cases reported across 37 states. This is among the largest measles outbreaks in recent U.S. history. The CDC recommends ensuring all children and adults are up to date on MMR vaccination.
Which states have the most measles cases right now?
Case counts vary by state and are updated weekly. Use the map and table above to see current case counts for every state. The red section above highlights states with multiple reported cases so you can spot the biggest current signals quickly.
What are the symptoms of measles?
Measles symptoms typically begin 7–14 days after exposure and include high fever (up to 104°F), cough, runny nose, red and watery eyes (conjunctivitis), and a rash that starts on the face and spreads downward. Small white spots (Koplik's spots) inside the mouth may appear 2–3 days before the rash. If you suspect measles, contact your healthcare provider before visiting a clinic to avoid exposing others.
What counts as a measles outbreak?
A measles outbreak is generally defined as three or more linked measles cases in a community. Outbreaks tend to occur in communities with lower vaccination rates where the virus can spread more easily.
How can measles be prevented?
Measles is highly preventable with the MMR (measles, mumps, rubella) vaccine. Two doses of MMR vaccine are about 97% effective at preventing measles. Communities need at least 95% vaccination coverage to maintain herd immunity. Check MMR coverage by state .
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.