During June 2015 a small delegation from Nanjing Youth Olympic Games Organizing Committee (NYOGOC) visited Buenos Aires for a series of debriefing workshops and seminars to pass on their expertise focusing on strategic decisions to be made in the early stages such as legacy, the use of the YOG to impact youth and sport, and benefits of the YOG to engage communities.

[18][14] Three years before the event, a survey showed that public support had reached 82.3 per cent in favour of the Youth Olympic games in Buenos Aires.

During the second visit of the International Olympic Committee's Coordination Commission to the city, on 13 and 14 August 2015, Mr. Fredericks highlighted the implementation of 13 of the recommendation of the Agenda 2020 by BAYOGOC.

[7][22] It was announced then that each cluster would include an area called YOG FEST where sporting experiences, family entertainment and cultural activities would take place.

[24] Adjacent to downtown Buenos Aires and stretching three kilometres along the scenic banks of the River Plate, this area was distinguished by swathes of parks.

Located to the South of Buenos Aires, Roca Park is a vast area of 200 hectares in the district of Villa Soldati, a neighborhood that has been targeted by the local Government in need of urban development.

This area was also the site of the Youth Olympic Village (YOV), from where 65 per cent of the athletes were able to walk to their competition venues,[26] and after the event it would become the new location for the CeNARD.

Located to the east of the city, this cluster occupies a significant portion of the Río de la Plata riverbank and includes the old Puerto Madero docks as venue for water sports.

Athens (Greece) - La Plata (Buenos Aires) - Parana (Entre Rios) - Santa Fe (Santa Fe) - Iguazu (Misiones) - Corrientes (Corrientes) - Jujuy (Jujuy) - Salta (Salta) - Tucuman (Tucuman) - Catamarca (Catamarca) - La Rioja (La Rioja) - Mendoza (Mendoza) - San Juan (San Juan) - Cordoba (Cordoba) - Neuquen (Neuquen) - Bariloche (Rio Negro) - Ushuaia (Tierra del Fuego) - Buenos Aires (Federal Capital) (Argentina) The opening ceremony of the 2018 Summer Youth Olympics was held at the Obelisco de Buenos Aires on 6 October 2018 at 20:00 (8 PM) Argentina Time.

Supatchanin Khamhaeng of Thailand originally won the gold medal at the Girls' +63 kg Weightlifting event, but was disqualified in 2019 after testing positive for a banned substance.

The emblem reflects the diversity of Buenos Aires and it is inspired by the city's vibrant colours, eclectic culture, iconic architecture and the many neighbourhoods that make up the Argentine capital.

Each letter represents a famous landmark, including the Floralis Genérica, Space Tower, the Columbus Theatre, the National Library and the Obelisk.

A short video produced by the Buenos Aires Youth Olympic Games Organising Committee (BAYOGOC) shows what each letter on the emblem relates to.

[34] The president of the Buenos Aires 2018 Organising Committee, Gerardo Werthein, said that the mascot "seeks to inspire young people on the transformative power of Olympism and sport".