Gymnastics at the 2018 Summer Youth Olympics was held from 7 to 16 October at the America Pavilion in Buenos Aires, Argentina.

The 2018 Summer Youth Olympics, officially known as the III Summer Youth Olympic Games, and commonly known as Buenos Aires 2018, were an international sports, cultural, and educational event held from 6 to 18 October 2018 in Buenos Aires, Argentina. They were the first Youth Olympic Games held outside of Eurasia, and the first Summer Games held outside of Asia and the first to be held in the Western and Southern hemispheres. It was the second Olympic Games held in South America after the 2016 Summer Olympics in Rio de Janeiro, Brazil.