The Glen Mills Schools was a youth detention center for juvenile delinquents located near Glen Mills in Thornbury Township, Delaware County, Pennsylvania, United States, for boys between 12 and 21 years of age. The school was founded in 1826 and was the oldest surviving school of its type in the United States until all residents were ordered removed on March 25, 2019, by the Pennsylvania Department of Human Services. The school's licenses were subsequently revoked for not complying with the state's Human Services Code and regulations.Previously, Glen Mills had been lauded as a "pathbreaking concept for modernizing failing reform schools in the United States". The St. Petersburg Times in 1996 called it "the country's most radical and, some say, its most effective answer yet to juvenile crime". and the New York Times praised its "culture that encourages self-discipline and a sense of mutual respect and responsibility". Juvenile courts in other states, such as California and Texas, along with various Pennsylvania jurisdictions, sent boys adjudged delinquent to Glen Mills Schools. Even troubled boys from other countries, such as Bermuda and Germany, were also sent there. Bermuda's Department of Child and Family Services, for example, sent boys to Glen Mills for more than 35 years between 1982–2017, paying almost $1.6 million to the school between 2001 and 2019. On the school's 125th Anniversary, it described itself as having "500 court-adjudicated male youth on an open residential campus, providing students with academics, vocational programs, character and leadership skill development, behavior services, athletics and recreation".The school denied allegations of mistreatment and appealed the revocation of its licenses to the Pennsylvania DHS Bureau of Hearings and Appeals, but settled a class action lawsuit in 2023.