Cook Islands participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina from 6 October to 18 October 2018.
Swimming
The Cook Islands qualified 1 athlete.
Boys AthleteEventHeatsSemifinalsFinalTimeRankTimeRankTimeRank Bede Aitu50 metre backstroke28.9024 did not advance100 metre backstroke1:03.4925 did not advance
References