On January 13, 2026, the U.S. Supreme Court heard arguments in two cases from Idaho and West Virginia that will influence who gets to play on girls’ and women’s high school and college sports teams. The laws being contested bar transgender girls (those whose gender identity differs from their sex assigned at birth) and women from competing on girls’ and women’s teams at public K-12 schools and public colleges. The decision expected this summer will not cover professional leagues or the Olympics, but rather decide the legality of existing state laws targeting trans athletes in high school and collegiate sports.
The Idaho case, Little v. Hecox, began when Lindsay Hecox, a transgender woman, tried to join the women’s cross-country team at Boise State University but was blocked by the state’s 2020 “Fairness in Women’s Sports Act.” This state law requires school sports to be separated based on “biological sex” (physical traits like chromosomes and reproductive anatomy) on a birth certificate and bars transgender girls and women from girls’ and women’s teams. A federal appeals Court blocked the law, finding that it targeted transgender athletes for unequal treatment and opened the door to invasive sex-verification exams that would fall mainly on girls and women. Idaho is asking the Supreme Court to reverse that decision, arguing the state is protecting biological girls’ and women’s opportunities.
The West Virginia case centers on 15‑year‑old Becky Pepper‑Jackson, often called B.P.J. in Court documents. She is a transgender girl who has identified as female since elementary school and uses puberty blockers (medications that delay physical changes of puberty) and estrogen as part of her medical care. West Virginia’s 2021 “Save Women’s Sports Act” kept her off her middle school girls’ track and cross-country teams because she was listed male at birth. A different federal appeals Court ruled that applying the law to Pepper‑Jackson violates Title IX, the 1972 federal law that bans sex discrimination in schools that receive federal money, because it singles her out for different treatment based on her transgender status rather than her behavior or performance on the team. West Virginia argues that the law simply preserves sex-separated teams and that Title IX allows this.
Legally, the justices are being asked whether these laws violate Title IX and the Constitution’s Equal Protection Clause. One side argues that excluding transgender girls from girls’ teams is discrimination “on the basis of sex” and that laws targeting a small, historically marginalized group deserve especially careful review. The other side insists that the laws draw lines based on sex, not transgender status, and should stand as long as they are reasonably related to goals like competitive fairness and safety. The Court is also weighing more technical issues, such as whether the cases are still “live” if the individual athletes’ situations change, but the broader stakes are about how schools must treat transgender students who want to play sports.
Supporters of the Idaho and West Virginia laws claim they are trying to protect the gains women and girls have made under Title IX. They argue that male puberty tends to bring advantages in size, strength, and speed, and that those advantages can remain even if someone later lowers their testosterone levels. However, medical data show that this is not true in most cases. During oral arguments, one conservative justice described sports as a “zero‑sum game,” suggesting that if one athlete gains a spot or a title, someone else loses it. To many, this complicates the issue, because they see the inclusion of trans athletes as threatening championships, scholarships, and athletic opportunities.
Advocates for transgender inclusion see these laws as discriminatory and unnecessary. Lawyers for Hecox and Pepper‑Jackson point out that many transgender girls in school sports have not gone through male puberty at all or have undergone years of hormone treatment, so a blanket rule that treats them as if they all share the same physical advantages does not match reality. They note that, for years before statewide bans, local school districts and athletic associations used case‑by‑case policies and hormone guidelines without major issues. They also emphasize that trans youth already face high levels of bullying and mental health challenges, and that playing on school teams is associated with higher grades, stronger connections to school, and lower rates of depression. From their perspective, the question is how to keep sports open, safe, and fair for every student who wants to play.
Furthermore, many critics of laws banning transgender inclusion policies are already shifting while the court deliberates. The NCAA announced in 2025 that competition in women’s college sports is limited to athletes who were assigned female at birth, while men’s sports remain open to athletes of any birth sex or gender identity. At the K–12 and public college levels, more than half of the states have passed laws similar to Idaho’s and West Virginia’s, while others continue to allow students to play on teams that match their gender identity. Some women’s sports advocates and LGBTQ+ groups have urged courts and policymakers to focus more on long‑standing problems such as unequal funding, lack of media coverage, and harassment, arguing that these issues have a bigger impact on girls’ and women’s sports overall than the incredibly small number of transgender athletes.
The Supreme Court’s ruling later this year will set a legal baseline for how schools must treat transgender students who want to play sports. For high school and college communities, the outcome will shape not only who lines up at the starting line or on the court, but also which students feel seen and affirmed in their identities.
