Measles Cases Across the United States
Last updated:
This measles tracker starts with the current CDC national total, then shows state detail from the JHU tracker. State report dates help with orientation, but formal outbreak status and exposure guidance come from state and local health departments.
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.
4410 confirmed measles cases in 47 jurisdictions in 2026.
Measles cases have been reported in 47 jurisdictions so far in 2026.
Source and context
How to read this measles tracker
Updated
2026-10-15
Coverage
CDC national totals plus JHU state and county tracker detail
Best For
Fast outbreak orientation and state-to-county drill-down
CDC supplies current national totals and formal outbreak counts. JHU county rows provide approximate state detail; state and local health departments remain the authority for current outbreak and exposure guidance.
States with the Highest Tracked Case Totals
Highest current case totals
Pennsylvania
State measles page
312 cases in the current state tracker view.
South Carolina
State measles page
214 cases in the current state tracker view.
Texas
State measles page
167 cases in the current state tracker view.
Utah
State measles page
144 cases in the current state tracker view.
Wisconsin
State measles page
139 cases in the current state tracker view.
Ohio
State measles page
121 cases in the current state tracker view.
Cases by State
This map compares approximate 2026 JHU tracker views. An official state dashboard may show a different count; open a state page for the dated or checked source.
States with Multiple Reported Cases
All States
| State | Risk Level | Current JHU tracker view |
|---|---|---|
| Pennsylvania | High | 312 |
| South Carolina | High | 214 |
| Texas | High | 167 |
| Utah | High | 144 |
| Wisconsin | High | 139 |
| Ohio | High | 121 |
| Kentucky | High | 103 |
| New York | High | 72 |
| Florida | High | 67 |
| Maryland | High | 42 |
| Virginia | High | 41 |
| Arizona | High | 36 |
| Minnesota | High | 31 |
| California | High | 29 |
| Indiana | High | 25 |
| Washington | High | 22 |
| Iowa | High | 21 |
| North Dakota | High | 19 |
| Colorado | High | 16 |
| Michigan | High | 15 |
| Delaware | High | 14 |
| Missouri | High | 14 |
| New Mexico | High | 14 |
| Illinois | High | 13 |
| North Carolina | High | 13 |
| Georgia | High | 12 |
| Oregon | High | 11 |
| Kansas | Moderate | 9 |
| South Dakota | Moderate | 9 |
| Oklahoma | Moderate | 7 |
| Wyoming | Moderate | 7 |
| Tennessee | Moderate | 6 |
| Idaho | Moderate | 5 |
| Maine | Moderate | 5 |
| Montana | Moderate | 4 |
| Nebraska | Moderate | 3 |
| New Jersey | Moderate | 3 |
| Massachusetts | Low | 2 |
| Alabama | Low | 1 |
| Connecticut | Low | 1 |
| District of Columbia | Low | 1 |
| Hawaii | Low | 1 |
| Louisiana | Low | 1 |
| Rhode Island | Low | 1 |
| Vermont | Low | 1 |
| West Virginia | Low | 1 |
| Alaska | Low | 0 |
| Arkansas | Low | 0 |
| Mississippi | Low | 0 |
| Nevada | Low | 0 |
| New Hampshire | 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
CDC supplies the national case total and formal outbreak count. The JHU Measles Tracking Team compiles the approximate state and county detail from state and local health department reports, so those rows may differ from CDC totals due to scope and timing.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 CDC update, there have been 4410 confirmed measles cases across 47 jurisdictions in 2026.
Is there a measles outbreak in the United States in 2026?
Yes. CDC reports 42 new measles outbreaks in 2026 and 4410 confirmed cases across 47 jurisdictions. States and local health departments have the most current guidance for specific outbreaks and exposures.
Which states have the most measles cases right now?
Case counts vary by state and are updated weekly. Use the map and table on this page to see current case counts for every state. The states with the largest current case counts are highlighted first.
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.
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.
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.
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.