Muhammad Irwan Shah Bin Arismail (born 2 November 1988) is a Singaporean former footballer who last played as a central-midfielder.

[citation needed] Irwan helped LionsXII in making history as the first foreign club to win the 2013 Malaysia Super League.

Irwah left LionsXII to join Warriors in 2014 which he helped the club to win the 2014 S.League in his first season.

Irwan scored his first goal for Tampines Rovers in a friendly match against Terengganu FA on 14 January 2017.

On 2 November 2019, Irwan scored in the 2019 Singapore Cup Final helping the club to clinch the trophy.