Ondrej Elexa (born 7 October 2000) is a Slovak footballer who plays for Partizán Bardejov as a centre-back.
Elexa made his professional Fortuna Liga debut for Nitra against Spartak Trnava on 4 August 2019. Elexa was fielded as a center-back in the starting line-up, but was replaced by Marek Fábry after about an hour of play, as Nitra was one goal down. The final score was 2-0 for Trnava.
On 29 July 2020, Elexa returned to his hometown of Koà ¡ice where he joined a second division club FC Koà ¡ice - an unofficial successors to his youth club VSS Koà ¡ice.