Matt Gallagher may refer to:

• Matt Gallagher (author) (born 1983), American author
• Matt Gallagher (Gaelic footballer) (born 1960s), Irish former Gaelic footballer
• Matt Gallagher (businessman) (1915–1974), Irish property developer and businessman
• Matt Gallagher (filmmaker), Canadian film director, producer and cinematographer
• Matt Gallagher (rugby union) (born 1996), English rugby union player
• Mike Gallagher (footballer), sometimes referred to as Matt, (died 1984), footballer