Marcus Peter Stoinis is an Australian international cricketer who represents the Australia national cricket team in Twenty20 International cricket. He is a right-handed batting all-rounder who bowls right-arm medium. Domestically, Stoinis captained Melbourne Stars in the 2024–25 Big Bash League and has played Sheffield Shield cricket for Western Australia and Victoria.

Stoinis is an Australian of Greek heritage, he was born in Perth, and represented Western Australia at both under-17 and under-19 level. Stoinis played for the Australian under-19 cricket team at the 2008 ICC Under-19 World Cup. The following year, he represented Australia at the Hong Kong Sixes.

Stoinis made his Twenty20 International debut against England on 31 August 2015. His One Day International debut came against the same team on 11 September 2015. On 30 January 2017, in his second ODI against New Zealand, Stoinis took three wickets and scored 146 not out. This was the highest ODI score from seventh in the batting order by an Australian batsman. Stoinis was awarded man of the match, despite his team losing.

In March 2017, he was added in the Australia Test squad for the third and fourth Tests against India as a replacement for the injured Mitchell Marsh, although he did not play in either match.