California has won an important court battle over transgender students in school sport after a federal judge dismissed a lawsuit brought by the Trump administration.
The US Department of Justice had argued that California was violating Title IX by allowing transgender students to compete on teams matching their gender identity.
US District Judge Cynthia Valenzuela dismissed the case, ruling that federal law does not clearly require California schools to exclude transgender girls from girls’ teams.
California transgender athletes: why did the court reject the case?
The dispute centred on Title IX, the landmark federal law prohibiting sex discrimination in education programmes receiving federal funding.
The Trump administration argued that Title IX requires school sports participation to be determined by biological sex.
California disagreed.
Judge Valenzuela ultimately found that Title IX and its regulations did not clearly impose such a requirement.
Her decision also addressed a major US Supreme Court ruling from June 2026, which allowed states to introduce laws restricting transgender girls and women from female sports teams.
However, there is an important distinction.
The Supreme Court ruled that states may adopt sex-based eligibility rules. It did not rule that every US state is required to introduce them.
Nor did it decide that states maintaining more inclusive policies are automatically breaking federal law.
Billions in education funding were at stake
The case carried potentially enormous financial consequences.
The Justice Department had threatened around $44.3 billion in federal education funding if California refused to change its policies.
Judge Valenzuela found that California had not been given sufficiently clear legal notice that excluding transgender students was a condition for receiving those funds.
That effectively prevented the federal government from using Title IX funding rules to force the state into introducing a blanket ban.
What does the ruling mean for trans athletes?
The ruling does not create a national right for transgender girls to participate in girls’ sport.
But it also confirms that the Supreme Court has not created a nationwide ban.
Instead, the United States remains deeply divided.
More than two dozen states have introduced restrictions affecting transgender athletes, while states such as California continue to follow more inclusive policies.
California itself has modified its sporting rules. Under current arrangements, transgender competitors can participate, but their qualification cannot remove a place from a cisgender competitor, while podium positions may also be shared.
The Justice Department has said it is considering whether to appeal.
For California transgender athletes, however, the immediate outcome is clear: the federal government has failed, for now, to force the state to exclude them from school sport.
