Julien Cagnina (born 4 June 1994) is a Belgian tennis player.

Cagnina has a career high ATP singles ranking of 239 achieved on 30 October 2017.

He also has a career high ATP doubles ranking of 353 achieved on 10 October 2015.

Cagnina represents Belgium at the Davis Cup, where he has a W/L record of 0–1.

This biographical article relating to Belgian tennis is a stub.