The U.S. Supreme Court ruled Tuesday that laws in Idaho and West Virginia restricting transgender girls and women from competing on female school sports teams do not violate either the Constitution or Title IX, handing supporters of the measures a major legal victory while dealing another setback to transgender rights advocates.
The Court’s decision upholds state laws that limit participation in girls’ and women’s scholastic athletics based on biological sex. In doing so, the justices concluded that the laws are consistent with federal law prohibiting sex discrimination in education and do not violate constitutional protections.
Justice Brett Kavanaugh, writing for the Court, stated that “states may maintain women’s and girls’ sports for biological females,” affirming the authority of states to adopt such policies.
The ruling is expected to influence numerous lawsuits challenging similar laws across the country.
What the Court Decided
The decision centers on laws enacted in Idaho and West Virginia that prohibit transgender girls and women from participating on female athletic teams in public schools.
Supporters argued the measures are necessary to preserve competitive fairness and athletic opportunities for cisgender female athletes. Opponents argued the laws discriminate against transgender students and violate protections guaranteed under Title IX and the Equal Protection Clause.
The Court unanimously concluded that the challenged laws do not violate Title IX, rejecting arguments that federal education law requires schools to allow transgender athletes to compete according to their gender identity.
The ruling also determined that the state laws are constitutional.
Background of the Cases
The Idaho lawsuit was brought by Lindsay Hecox, a transgender student who challenged the state’s Fairness in Women’s Sports Act after seeking to compete at Boise State University.
During court proceedings, Hecox’s attorneys noted that she never made the university’s women’s teams, arguing the lawsuit nevertheless addressed broader questions of equal treatment under federal law.
The West Virginia case involved Becky Pepper-Jackson, a 16-year-old high school student who has publicly identified as a girl since childhood and has undergone puberty-blocking treatment.
Pepper-Jackson became one of the country’s most closely watched transgender student-athletes after winning a state championship in the girls’ shot put. According to court filings, she previously competed in middle school cross-country before later excelling in field events.
Her attorneys argued that because of her early medical transition, assumptions regarding athletic advantages did not apply in her case.
The Supreme Court ultimately rejected those arguments in upholding West Virginia’s law.
A Growing National Debate
The decision comes as more than two dozen Republican-led states have adopted laws limiting transgender participation in girls’ and women’s athletics.
Several lawsuits challenging similar laws remain pending in states including Connecticut and California.
The Court’s decision is expected to shape how those cases proceed, though it does not automatically resolve every legal challenge because some involve different state statutes and legal questions.
The issue has become one of the nation’s most divisive education and civil rights debates, with lawmakers, athletic organizations, advocacy groups, and athletes offering sharply different perspectives.
NCAA and Olympic Policies Have Also Changed
The legal ruling follows policy changes made earlier this year by both the NCAA and the U.S. Olympic and Paralympic Committee.
Those organizations adopted restrictions on transgender women competing in women’s sports after President Donald Trump signed an executive order directing federal agencies to interpret Title IX in a manner limiting transgender participation.
While those policies operate independently from the Supreme Court’s decision, both developments reflect a broader national shift in how athletic eligibility is being addressed.
Public Opinion Remains Divided
Polling has suggested Americans remain divided, though recent surveys indicate more respondents support restrictions than oppose them.
According to an Associated Press-NORC Center for Public Affairs Research poll conducted in late 2025, approximately six in ten U.S. adults favored requiring transgender youth to compete according to the sex assigned at birth. Roughly two in ten opposed such policies, while about one-quarter expressed no opinion.
Researchers estimate that approximately 724,000 Americans between the ages of 13 and 17 identify as transgender, along with roughly 2.1 million adults nationwide.
Supporters and Critics Respond
Supporters of the ruling argued that biological differences between males and females create legitimate competitive concerns in athletics and that states have an interest in protecting opportunities for female athletes.
State officials defending Idaho’s law argued the policy promotes fairness because physiological differences between the sexes remain relevant in competitive sports.
Critics argued the ruling allows governments to exclude transgender students from school activities consistent with their gender identity and warned that the decision could encourage additional restrictions affecting transgender Americans.
Prominent athletes have publicly aligned on both sides of the debate.
Former tennis champion Martina Navratilova, Olympic swimmer Donna de Varona, swimmer Summer Sanders, and beach volleyball gold medalist Kerri Walsh Jennings have supported restrictions on transgender participation in women’s sports.
Soccer stars Megan Rapinoe and Becky Sauerbrunn, along with WNBA legend Sue Bird and basketball star Breanna Stewart, have voiced support for transgender athletes’ inclusion.
How the Decision Fits Into Recent Supreme Court Rulings
The ruling continues a series of recent Supreme Court decisions addressing transgender rights.
In 2020, the Court held in Bostock v. Clayton County that federal law prohibits workplace discrimination against LGBTQ employees under Title VII.
More recently, however, the Court upheld state restrictions on gender-affirming medical care for transgender minors and has now concluded that Title IX does not require states to permit transgender girls and women to compete on female athletic teams.
Legal scholars expect Tuesday’s ruling to become one of the Court’s defining education and civil rights decisions, with significant implications for schools, athletic organizations, policymakers, and future litigation.
What Comes Next
Although the Supreme Court has resolved the constitutional questions presented in the Idaho and West Virginia cases, litigation involving transgender athletes is far from over.
Courts across the country continue to hear challenges involving different state laws, local school policies, and questions surrounding federal civil rights protections.
Tuesday’s decision establishes an important legal precedent, but lawmakers, educators, athletic governing bodies, and advocacy organizations are likely to remain engaged in one of the country’s most closely watched policy debates for years to come.