David Johnston (born 28 February 1994) is an Irish rugby union player, currently playing for English side Ealing Trailfinders in the RFU Championship.

Johnston made his debut for Munster on 5 September 2015, starting in the opening game of the 2015–16 Pro12 against Benetton.

[2] Johnston was nominated for the 2016 Munster Academy Player of the Year Award.

[3] English RFU Championship side Ealing Trailfinders announced that Johnston would be joining them on a one-year contract for the 2018–19 season in April 2018.

[4] Johnston made 16 appearances for Ealing in his first season with the club, scoring 5 tries.