The Supreme Court ruled 6-3 on June 30, 2026 that states can legally ban transgender girls and women from competing on school athletic teams, upholding laws from Idaho and West Virginia that had been challenged in lower courts. The decision affects at least 27 states with similar restrictions already in place. Justice Kavanaugh wrote the majority opinion, overturning earlier rulings that sided with trans students who challenged the bans. This caps a years-long legal battle over school sports eligibility that became a central flashpoint in ongoing culture wars around transgender rights.