Matlok Griffiths (b. 1983, Perth, Australia) is an artist and occasional musician who lives and works in Melbourne, Australia. He has presented solo and two-person exhibitions at Sutton Gallery, Melbourne (2025), Darren Knight Gallery, Sydney (2022, 2019, 2107, 2016), and ReadingRoom, Melbourne (2024, 2022, 2018). His work has been featured in numerous group shows, including at Wolford House, Los Angeles (curated by Nichole Caruso-Siebers, 2024) and the National Gallery of Victoria, Melbourne (2023).

In 2016, Griffiths completed a four-month mentorship with artist Stanley Whitney through the support of a Skills and Development Grant awarded by the Australia Council for the Arts (now Creative Australia). His work is held in the collections of the National Gallery of Victoria, Melbourne, and Artbank, Australia. In 2018, Griffiths released a music album, 1800, with his collaborators (Katrina Griffiths and Travis MacDonald) under the name Big Supermaket.