Billy Dardis (born 31 January 1995) is an Irish rugby union player.

[3] After three years in the Leinster academy, he was awarded his first fully professional contract ahead of the 2016–17 season.

After making no appearances for the province, however, Dardis left at the end of the 2016–17 season with Leinster not offering a new contract.

Dardis captained the Ireland national rugby sevens team that qualified for the 2020 Summer Olympics.

[10][11] He competed for Ireland at the 2022 Rugby World Cup Sevens in Cape Town.