Mackenzie Martin (born 26 October 2003) is a Welsh professional rugby union player who plays as a number eight for United Rugby Championship club Cardiff and the Wales national team.

[3] Martin first played as a prop, before moving to the back row.

[4] He featured for Cardiff RFC as they won the 2021–22 Indigo Group Premiership.

[4] In July 2023, he signed a pro contract with Cardiff Rugby to move from the academy to the first-team squad.

[10] In January 2024, he was included for the senior Wales squad for the 2024 Six Nations Championship.