Joel Daniel Coen (born November 29, 1954) is an American filmmaker, working with his brother, Ethan Coen, together known as the Coen brothers(/ˈkoʊən/). Their films span many genres and styles, which they frequently subvert or parody. Among their most acclaimed works are Blood Simple (1984), Raising Arizona (1987), Miller's Crossing (1990), Barton Fink (1991), Fargo (1996), The Big Lebowski (1998), O Brother, Where Art Thou? (2000), No Country for Old Men (2007), A Serious Man (2009), True Grit (2010) and Inside Llewyn Davis (2013).

The brothers generally write, direct and produce their films jointly. However, due to regulations, Joel received sole directing credit while Ethan received sole production credit until The Ladykillers (2004). From then on, they would be credited as directors and producers and shared editing credits under the alias Roderick Jaynes. The duo started directing separately in the 2020s, resulting in Joel's The Tragedy of Macbeth (2021), Ethan's Jerry Lee Lewis: Trouble in Mind (2022) and Drive-Away Dolls (2024). Together, they have been nominated for 13 Academy Awards and one individual nomination. They share Best Original Screenplay for Fargo and Best Picture, Best Director and Best Adapted Screenplay for No Country for Old Men. They won the Palme d'Or for Barton Fink at the 1991 Cannes Film Festival.