21 Thunder is a Canadian television drama series which follows star players of an under-21 academy for the fictional Montreal Thunder soccer team in Montreal, Quebec. The series was created by Adrian Wills, Riley Adams, and Kenneth Hirsch in 2016. It features an ensemble cast that includes, among others, RJ Fetherstonhaugh, Colm Feore, Stephanie Bennett, Emmanuel Kabongo, and Conrad Pla. The series aired in Canada on CBC Television beginning July 31, 2017, to generally positive reviews.

21 Thunder was released in all other countries worldwide on March 1, 2018, as a Netflix Original Series by Netflix although it was removed in March 2022. It received generally positive international reception.