Miss Teen USA 2021 was the 39th Miss Teen USA pageant, held at the Paradise Cove Theater of River Spirit Casino Resort in Tulsa, Oklahoma, United States, on November 27, 2021. Ki'ilani Arruda of Hawaii crowned Breanna Myles of Florida as her successor at the end of the event. It was the first year of the competition under Crystle Stewart's directorship. This was the first time since 1988 that the State Costume competition took place before the eve of preliminary competition.