[1] Denmark qualified a boys' and girls' combined team based on ranking in the Youth Olympic Games Junior Nation Rankings.

[2][3] Denmark qualified one athlete based on its 2018 Cadet World Championship performance.

[4] Denmark qualified one gymnast based on its 2018 European Junior Championship performance.

[5] Denmark qualified as one athlete based on the Buenos Aires 2018 Olympic Standings ranking.

[6] Denmark qualified one boat based on its 2017 World Junior Rowing Championships performance.