Jonathan Borlée (French pronunciation: [ʒɔnatɑ̃ bɔʁle]; born 22 February 1988) is a former Belgian sprinter, who specializes in the 400 metres.

The patriarch of the Borlee family is Jacques, bronze medalist at the 1983 European Indoor Championships in Budapest on 200 m, while his first wife Edith Demaertelaere was a good sprinter with a personal best of 23.89.

The four sons are all 400 m specialists, the twins Jonathan and Kevin, both Olympic finalists in London 2012, Dylan and the youngest Rayane.

On August 19, 2008, at the semi-finals of the 2008 Summer Olympics, Jonathan Borlée ran a new personal best of 45.11s - yet this was not good enough to reach the final.

In the 4 × 400 m relay, with teammates Kévin Borlée, Cédric Van Branteghem and Arnaud Ghislain, they qualified for the final with a new national record of 3:00.67s.

At the end of 2008, Jonathan Borlée moved together with his brother Kévin to Tallahassee to enroll in Florida State University.

Shortly thereafter, Jonathan injured himself: a stress fracture on the tarsus, which ruled him out for the rest of the season, including the 2009 World Championships.

In the final, with Cédric Van Branteghem instead of Nils Duerinck, they won silver with a time 3:06.94s, another national record.

The Belgian 4 x 400 team that Borlée was in set a new area record in winning the gold medal of the European Indoor Championship.

At the 400 m of the European Championships in Berlin, Jonathan Borlée reached the final with a win in heat 2 in 45.19s and a 2nd place finish in the 1st semi-final in a personal season's best of 44.87s.

The Belgian 4 x 400 metres relay team, which included Julien Watrin, Robin Vanderbemden, 2018 junior world champion Jonathan Sacoor and younger brother Dylan, reached the final with a win in heat 2 in 3:02.44s, the 4th fastest qualifying time.

In the final Julien Watrin and Robin Vanderbemden were replaced by the twin brothers Jonathan and Kevin.