The Supreme Court’s trans athlete ruling arrived Tuesday, with all nine justices agreeing that bans on transgender girls competing on girls’ school sports are permissible under a federal education law and the six conservative justices adding that such bans do not violate the Constitution. The decision preserves laws in 25 states that bar transgender girls from girls’ teams, and Justice Sonia Sotomayor warned in dissent that the ruling lowers the legal bar for laws that treat men and women differently across American life.
Former Sotomayor clerks and legal scholars said the consequences for gender equality reach well beyond athletics. The constitutional question the court reserved on intermediate scrutiny for transgender status now sits with lower courts.
What the Justices Decided
The court announced its decision in two consolidated cases, Little v. Hecox, the Idaho challenge, and West Virginia v. B.P.J., the West Virginia challenge. By a 9-0 vote, the justices held that Title IX permits states to operate sex-separated athletic teams based on biological sex. By a 6-3 vote, the same court ruled that the bans do not violate the Constitution’s Equal Protection Clause, and the procedural history of both cases is the case docket at the Supreme Court.
KEY FIGURES
- 9-0 vote on Title IX
- 6-3 vote on Equal Protection
- 25 states with similar bans
- 2 trans athletes as plaintiffs
Title IX and the Constitution’s Equal Protection Clause arrive at the same conclusion by different routes. Title IX, as amended in 1974, expressly allows schools to operate sex-separated athletic teams, and Kavanaugh’s majority found no conflict between the federal law and the state statutes. On the constitutional side, the opinion applied intermediate scrutiny, a mid-tier test that asks whether a law is substantially related to an important government interest, and held that preserving opportunities for biological females satisfies that bar. The three liberal justices objected that the lower courts had not yet assessed the scientific evidence on physical differences between transgender and cisgender girls.
The two cases traveled through lower courts before landing at the Supreme Court. Federal appeals courts had blocked enforcement of both the West Virginia and Idaho bans. Lawyers for Idaho Governor Brad Little and for West Virginia then asked the justices to take up the dispute, and the court agreed in July 2025. The cases were argued together in January and decided in the final week of the term. Justice Brett Kavanaugh wrote the majority opinion; Justice Sonia Sotomayor read a summary of her dissent from the bench.
Why the Vote Split That Way
On Title IX, the justices did not divide at all. By a 9-0 vote, they held that a 1974 amendment to the law expressly permits sex-separated athletic teams and that nothing in the text or in the Supreme Court’s 2020 Title VII ruling in Bostock v. Clayton County requires letting transgender girls compete. Kavanaugh distinguished the two statutes in plain terms. ‘Title VII concerns employment, whereas Title IX as relevant here focuses on sports,’ he wrote. ‘The two factual contexts are vastly different.’
Separate sports teams for biological males and biological females are reasonable. Given the inherent physical differences between the sexes, allowing only biological females to play on women’s and girls’ teams can reduce the risk of physical injury and ensure fair competition.
On the constitutional question, the vote fractured 6-3. Writing for the majority, Justice Brett Kavanaugh acknowledged that the science of athletic difference remained under examination in lower courts and that medical treatment affects physiological capacity. Even so, he wrote, ‘biological sex’ is a sufficient proxy for athletic ability for states to categorically bar transgender girls from girls’ teams. His conclusion rested on intermediate scrutiny: the state’s interest in fairness is ‘important,’ and separating teams by sex is ‘substantially related’ to that interest. The three liberal justices read their own rebuttal from the bench. Justice Sonia Sotomayor argued intermediate scrutiny requires looking at the subcategories of people who may not fit the broad generalizations the state relies on.
The Cost Beyond Trans Athletes
Sotomayor treated the case as far more than a sports ruling. In her dissent, she warned that the majority altered the standard the Supreme Court has used for nearly half a century to police sex-based laws. Under that older standard, the court struck down laws that relied on stereotypes about how women behave or what jobs they can do.
Sotomayor’s dissent pointed to a landmark precedent the court set when it struck down the Virginia Military Institute’s male-only admissions policy. The court ruled then that a state cannot deny women access to a program because most women would not succeed there, since at least a small subset of women would. Sotomayor argued that the same logic applies to transgender girls who have received puberty blockers and hormone therapy and fall outside the average athletic profile of boys. The majority, she wrote, treats those individuals as members of a single ‘biological male’ group regardless of physiological reality. She closed by saying the majority’s approach leaves ‘overbroad generalizations’ unchecked in law touching sex.
Legal scholars who study the conservative legal movement reached for a sharper name for the strategy. Mary Ziegler, a legal historian at the University of California, Davis, has described ‘biological sex‘ as ‘the new takedown strategy for anti-discrimination law.’ Ziegler explained that the goal is to redefine sex-discrimination protections so that men and women can be treated differently because their bodies differ. If courts adopt that logic, Ziegler said, it becomes harder to defend women against laws that restrict job options for pregnant workers, bar women from military schools, or treat one sex as the default in other settings.
Ava Ayers, an associate professor at Albany Law School and a former Sotomayor clerk, made her written case against the bans before the ruling. ‘What really concerns me about this decision is that he’s not only creating a bad precedent for trans people, he’s significantly lowering the protection all women get under equal protection,’ she said. Her worry is that courts will now be quicker to uphold laws that cite bodily difference as a reason to treat men and women differently. Pregnant workers, women seeking military commissions, and girls trying out for traditionally male programs have all been protected under the older discipline. That protection now rests on shakier ground than it did before Tuesday’s ruling. Sotomayor’s closing line in her dissent captured the broader stakes: the same approach, she wrote, could extend ‘to other contexts tomorrow.’
The majority applies its diminished view of equal protection to the sports context today. One can only hope that the same misguided approach does not and will not extend to other contexts tomorrow.
Inside the Two State Laws
Idaho’s Fairness in Women’s Sports Act, signed in 2020, was the first state law of its kind. It separated school athletic teams by ‘biological sex’ rather than gender identity. The statute named three categories (males, females, and coed) and barred any student assigned male at birth from competing on a women’s or girls’ team. A federal court blocked enforcement in 2020, the Ninth Circuit affirmed in 2024, and the state then asked the Supreme Court to weigh in.
Idaho’s law also contained an enforcement mechanism that drew wide attention during the litigation. Anyone ‘involved’ with a school team could trigger a sex dispute resolved by a ‘health examination’ verifying biological sex using reproductive anatomy, genetic makeup, or naturally produced testosterone. The Ninth Circuit held that this provision subjected all female athletes, transgender or not, to the threat of invasive verification.
West Virginia’s Save Women’s Sports Act, passed in 2021, took a similar shape with a different plaintiff. The law requires athletic teams to be designated by biological sex at birth and bars students assigned male at birth from girls’ and women’s teams. Becky Pepper-Jackson, then in middle school, had identified as a girl since third grade and had been taking puberty-delaying medication and hormone therapy. A federal district court upheld the law in 2023, the Fourth Circuit struck it down in 2024. The Supreme Court reversed both lower-court rulings on Tuesday.
| Feature | Idaho | West Virginia |
|---|---|---|
| Statute name | Fairness in Women’s Sports Act | Save Women’s Sports Act |
| Year enacted | 2020 | 2021 |
| Lower-court ruling | Ninth Circuit blocked (2024) | Fourth Circuit blocked (2024) |
| Plaintiff | Lindsay Hecox, Boise State student | Becky Pepper-Jackson, then in middle school |
| First of its kind | Yes | No |
The Athletes at the Center of the Cases
Becky Pepper-Jackson is 15 years old and lives in Bridgeport, West Virginia. She began socially transitioning in third grade, and her treatment includes puberty-delaying medication and hormone therapy, meaning she has not gone through a male puberty. Her lawyers told the lower courts that she is the only transgender student athlete in West Virginia. Her legal team at the American Civil Liberties Union, Lambda Legal, and Legal Voice, who represented her and Lindsay Hecox, issued the lawyers’ statements after the ruling.
Lindsay Hecox was a college student at Boise State University when she tried out for the women’s cross-country and track teams. She is transgender and had suppressed her testosterone for more than a year before being told she could not compete. The case was filed in 2020 as Hecox v. Little, named for then-Governor Brad Little. Sotomayor’s dissent on Tuesday leaned in part on Hecox’s situation to argue that the majority had resolved questions the lower courts had not yet answered.
What the Ruling Does and Doesn’t Settle
The decision does not require any state to bar transgender girls from girls’ sports. Chris Erchull, a senior staff attorney at GLBTQ Legal Advocates & Defenders, said in a statement that the ruling ‘does not require any state to follow West Virginia’s or Idaho’s cruel, overly broad approach, and it does not mandate categorical bans.’ States whose laws permit transgender girls to play on girls’ teams remain free to keep their policies, and the 25 states with bans already in place continue to enforce them.
On a more technical level, the decision leaves a constitutional question unresolved that could matter enormously. Kavanaugh’s opinion analyzed the sports bans under intermediate scrutiny because they turn on ‘biological sex,’ which the majority treated as a sex-based classification. The court did not decide whether all laws that single out transgender people should get the same intermediate-scrutiny treatment; that question was reserved. Because intermediate scrutiny is a tougher legal test than the looser ‘rational basis’ review, the court’s answer in future cases could determine whether other anti-transgender laws survive. Sotomayor made clear in her dissent that she reads the majority’s reasoning as inviting states to defend sex-based laws of every kind.
Litigation over transgender rights is far from over. The Title IX ruling is specific to athletics and does not say whether the law allows or forbids discrimination against transgender students in other school contexts, such as bathrooms, pronouns, or being outed to parents. ACLU and Lambda Legal lawyers said they will continue to bring Title IX claims on those separate fronts. As Joshua Block, the ACLU’s lead attorney, put it, the ruling leaves open the question of equal opportunity for transgender students outside the sports context.
- Settled: Title IX permits schools to operate sex-separated athletic teams by biological sex. (9-0 vote)
- Settled: State laws categorically excluding transgender girls from those teams do not violate the Equal Protection Clause. (6-3 vote)
- Unresolved: Whether all laws that single out transgender people for different treatment must be analyzed under intermediate scrutiny.
- Unresolved: Whether Title IX allows or forbids discrimination against transgender students in non-sports school contexts.
- Unresolved: Whether trans rights claims in non-athletic settings will succeed under the Equal Protection Clause.
Frequently Asked Questions
What did the Supreme Court decide in the trans athlete case?
The Court ruled 6-3 on Tuesday that state laws banning transgender girls from girls’ school sports do not violate the Constitution’s Equal Protection Clause. All nine justices agreed separately that Title IX, the federal sex-discrimination law in education, does not require states to let transgender girls compete on girls’ teams.
Does the ruling apply nationwide?
No. The decision resolves cases from Idaho and West Virginia and protects similar statutes that 25 other states have enacted since 2020. It does not require any state to adopt such a ban, and states whose laws permit transgender girls to compete on girls’ teams may keep their policies in place.
Can transgender students still sue schools for other forms of discrimination?
The ruling does not address bathroom policies, pronoun restrictions, or policies that forcibly out transgender students to parents. Lawyers at the American Civil Liberties Union and Lambda Legal said they will continue to litigate those questions under Title IX and the Equal Protection Clause.
What is Justice Sotomayor’s broader concern in her dissent?
Sotomayor warned that the majority’s reasoning lowers the legal bar for laws that treat men and women differently across American life, including in hiring, military service, and other sex-based classifications. She argues that intermediate scrutiny, the test Kavanaugh applied, requires courts to account for subcategories of people who do not fit general stereotypes about their sex, and the majority does not do that here.
