PEN America, founded in 1922, and headquartered in New York City, is a nonprofit organization whose goal is to raise awareness for the protection of free expression in the United States and worldwide through the advancement of literature and human rights. PEN America is the largest of the more than 100 PEN centers worldwide that together compose PEN International. PEN America has offices in New York City, Los Angeles, Washington, D.C., and since late 2023 also in Florida.

PEN International is a worldwide association of writers, founded in London in 1921 to promote friendship and intellectual co-operation among writers everywhere. The association has autonomous International PEN centres in more than 100 countries.