Martin Firrell (born 4 April 1963 in Paris, France) is a French public artist, stimulating debate in public space to promote positive social change.
Firrell uses language to engage directly with the public, promoting constructive dialogues, usually about marginalisation, equality and more equitable social organisation, with the aim of making the world more humane.He is one of a trio of artists (with Jenny Holzer and Barbara Kruger) known for socially engaged public art practice where text is foundational and central to that practice.His work has been summarised as "art as debate".