Mary Teresa "Terre" Nash (born 1947) is a Canadian Oscar-winning film director.
She received the President's Graduate Award, a Canada Council Doctoral Fellowship and the Fonds FCAC Pour l’aide et le Soutien a la Research (Québec).
Nash was the subject of the 1990 CBC documentary If You Love Free Speech: An Unguided Tour to the Twilight Zone, directed by Pierre Leduc.
The documentary follows Nash on a journey to Washington, D.C., in 1990, where she was invited to testify before a Congressional hearing on free speech.
This was the culmination of a 7-year battle, which saw her film If You Love This Planet go from the Oscar podium to the United States Supreme Court, over a Justice Department ruling (The Foreign Agents Registration Act) which required the names of U.S. citizens who rented her film, be reported to the FBI.