Schell's father Orville Hickok Schell, Jr., was a prominent lawyer who headed the New York City Bar Association and also the New York City Ballet. The senior Schell also chaired the human rights group Americas Watch from its founding in 1981 until his death in 1987, co-founded Helsinki Watch, forerunner to Human Rights Watch, and became the namesake of the Orville H. Schell, Jr. Center for International Human Rights at Yale Law School. Orville Schell III is the older brother of writer Jonathan Schell.