California MMR Vaccination Coverage
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What is the kindergarten MMR vaccination rate in California? This page shows California's measles, mumps, and rubella (MMR) vaccine coverage among kindergartners, whether it meets the 95% herd immunity threshold, and how it compares to nearby states. Data comes from the CDC's SchoolVaxView survey. Also see California measles cases.
kindergarten MMR coverage
2024-25 school year
Exemption Rates (2024-25)
Key Takeaways
- 1 California kindergarten MMR coverage is 96.1% for the 2024-25 school year.
- 2 This meets the 95% herd immunity threshold for measles.
- 3 Coverage has improved over recent years, up from 95.1% in 2020-21.
- 4 California has reported 17 measles cases in 2026.
CDC Recommendations at This Level
Vaccination rates are good but could be higher
- • Your state is close to the 95% herd immunity threshold but not quite there
- • Make sure your children are up to date on all recommended vaccines before school
- • If you know families who have questions about vaccines, encourage them to talk to their pediatrician
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.
California MMR Coverage Trend
Kindergarten MMR coverage rates by school year. Red dashed line = 95% herd immunity threshold.
Measles Cases in California
California has reported 17 measles cases in 2026. Active outbreak(s) reported.
View California measles data →Nearby States MMR Coverage
Sources & Methods
MMR coverage data comes from the CDC's SchoolVaxView program, which collects kindergarten vaccination coverage estimates reported by states and territories. Coverage is for the 2024-25 school year. Risk levels are computed relative to the 95% herd immunity threshold. Learn more about our methods .
More Health Data for California
Cities in California
Health data available for these California cities:
Frequently Asked Questions
What is the MMR vaccination rate in California?
Kindergarten MMR coverage in California is 96.1% for the 2024-25 school year. This meets the 95% herd immunity threshold.
Why is 95% coverage important?
Measles is extremely contagious. About 95% of a community needs to be vaccinated to prevent sustained transmission — this is called "herd immunity." When coverage drops below this threshold, outbreaks become more likely, putting unvaccinated individuals at risk.
What are vaccine exemptions?
Vaccine exemptions allow children to attend school without certain vaccinations. Medical exemptions are granted for children who cannot be safely vaccinated. Non-medical exemptions (religious or philosophical) vary by state law. Higher exemption rates are associated with lower coverage and increased outbreak risk.
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.