Eliza Clark is an American actress and playwright. She is the sister of Spencer Treat Clark. She has acted in minor parts in movies and commercials. In 1990 she briefly played Jessica Buchanan on the soap opera One Life to Live.
Clark has also directed many productions at Yale University since September 2003, including Wendy Wasserstein's Uncommon Women and Others, Rebecca Gilman's The Glory of Living and Wendy MacLeod's House of Yes.