Frederick Sherwood Dunn (June 10, 1893 – March 17, 1962) was an American scholar of international law and international relations. After working as a legal officer at the U.S. Department of State, he went into academia and taught at Johns Hopkins University, Yale University, and Princeton University, publishing several books during his career. He served as a founder and a director of both Yale's Institute of International Studies and the Center of International Studies at Princeton.
Dunn was born in New York City on June 10, 1893, to parents George Warren Dunn and the former Sarah Benton Brown. He graduated from the Kelvin School, a preparatory school for boys in Manhattan, in 1910. He then went to Princeton University, from where he graduated in 1914 with a Bachelor of Letters degree, followed by the New York University School of Law, from where he earned a Doctor of law degree in 1917.
He was admitted to the bar in 1917 but during that year entered the United States Army, in which he served until 1919. With the American Expeditionary Forces in France, he was a first lieutenant in the AEF Tank Corps.
Upon returning to the United States, Dunn began practicing law in Washington, D.C., in 1920. He worked as a legal officer at the U.S. Department of State, where his positions included being an Assistant Solicitor, an associate counsel in American and British Claims Arbitration, and a lawyer for United States agent before the Mixed Claims Commission (United States and Mexico). He was known as Ted Dunn to friends.