Dan Harris (born August 29, 1979) is an American screenwriter and director best known for working with Michael Dougherty and Bryan Singer, and whose writing credits include Superman Returns, X2, and X-Men: Apocalypse.

Harris was raised in Kingston, Pennsylvania. He went to Wyoming Valley West Middle and High Schools and graduated from Wyoming Seminary. Before he received his bachelor's degree from Columbia University, Harris's short film Urban Chaos Theory won the Grand Jury Prize for Best Short Film at the NoDance Film Festival, and the following winter, his short film, "The Killing of Candice Klein," played at the 2002 Sundance Film Festival.