The Minnesota Court of Appeals on Monday ruled that a transgender student at Coon Rapids High School had a right to use the boys' locker room.
Instead, the Anoka-Hennepin School District directed the student, N.H., to use an "enhanced privacy" bathroom separate from the boys' locker room in violation of the state's human rights act, the court said in a decision filed Monday.
The state Department of Human Rights called it a landmark ruling.
"This decision means that schools are now safer and more welcoming for transgender and gender nonconforming students across Minnesota," Human Rights Deputy Commissioner Irina Vaynerman said in a statement.
The Court of Appeals also referred to the statewide significance of the Anoka County case.
"An estimated 24,250 adults in Minnesota identify as transgender, all of whom were high school students at some point," the court said.
Anoka-Hennepin said in a statement it was reviewing the decision and carefully considering its next steps.
"The district's top priority is maintaining a learning environment that is safe, secure and free from discrimination, and its decision will be guided by those values," the district said.