The U.S. Supreme Court has ruled in favor of Idaho and West Virginia laws that restrict transgender student athletes from participating on female sports teams, delivering a major victory for supporters of the measures and marking another significant decision in the ongoing national debate over transgender rights.
In a decision issued Tuesday, the court overturned lower court rulings that had sided with transgender students challenging the bans. The laws in both states require public school and university sports teams to be organized according to what lawmakers describe as “biological sex,” preventing transgender girls and women from competing on female teams.
The ruling effectively clears the way for similar laws already enacted in 25 other states and is expected to influence future legal battles involving transgender participation in sports across the United States.
Idaho and West Virginia argued that the restrictions are necessary to ensure fairness and safety in women’s and girls’ athletics. Supporters of the laws contend that biological differences can create competitive advantages, while opponents view the measures as discriminatory and harmful to transgender students.
The legal challenges were brought by transgender students who argued that the laws violate the Equal Protection Clause of the U.S. Constitution’s 14th Amendment and Title IX, the federal civil rights law that prohibits sex-based discrimination in education.
The court’s decision comes amid a broader series of rulings and policies affecting transgender Americans. In 2025, the Supreme Court upheld a Tennessee law banning certain gender-related medical treatments for minors. The court has also allowed restrictions involving military service and passport gender designations under policies supported by President Donald Trump’s administration.
Trump, who returned to office in January 2025, has made transgender issues a central part of his administration’s policy agenda. His administration backed Idaho and West Virginia in the litigation and has introduced several measures aimed at limiting transgender participation in areas including sports.
The West Virginia case was filed by Becky Pepper-Jackson, a high school student in Bridgeport who participates in track and field events including shot put and discus. The Idaho challenge was brought by Lindsay Hecox, a transgender student at Boise State University.
During oral arguments earlier this year, several conservative justices expressed concerns about imposing a nationwide standard on the issue, citing ongoing debates surrounding the effects of hormone treatments and other gender-affirming medical interventions on athletic performance.
The ruling was issued on the final day of the Supreme Court’s current term and is expected to have far-reaching implications for schools, athletic organizations, and transgender rights advocates nationwide.