Ely Jacques Kahn, Jr. (December 4, 1916-May 28, 1994) was an American writer under the byline E.J. Kahn, Jr. with The New Yorker for five decades.

Born in New York City, he was the son of architect Ely Jacques Kahn . He attended the Horace Mann School and Harvard University, where he took his B.A. in 1937. He was hired by The New Yorker in 1937 and his first byline appeared there in the April 3, 1937 issue. Before World War II, he was drafted and served in the U.S. Army from 1941 to 1945. His Army experience marked resulted in The New Yorker publishing thirty-nine of his pieces on Army life; they were later collected in book form.

His long career with the magazine resulted in numerous books on such varied subjects as Coca Cola, Leslie McNair , the Trust Territory of the Pacific , Harvard University, Herbert Bayard Swope, Frank Sinatra, Dwayne O. Andreas of Archer Daniels Midland, and the Postal Inspection Service.

He taught writing at Columbia University from 1974 to 1977.

His book About The New Yorker and Me (New York: G.P. Putnam's, 1979) is a diary interspersed with memories of his life, the magazine, and its editor William Shawn--who Kahn calls "The Iron Mouse."

Kahn's Books

• Army Life, 1942
• G. I. Jungle, 1943
• McNair : Educator of an Army, 1945
• Fighting Divisions, 1945
• The Voice, 1947 (Sinatra)
• Who, Me?, 1949
• The Peculiar War, 1952
• The Merry Partners: The Age and Stage of Harrigan and Hart, 1955
• The Big Drink: The Story of Coca-Cola, 1960
• The A Reporter Here and There, 1961
• The Stragglers, 1962
• The World of Swope, 1964
• A Reporter in Micronesia, 1966
• The Separated People: A Look at Contemporary South Africa, 1968
• Harvard: Through Change and Through Storm, 1969
• The Boston Underground Gourmet, 1972
• Fraud: The United States Postal Inspection Service and Some of the Fools and Knaves It Has Known, 1973
• The American People, 1973
• The China Hands: America's Foreign Service Officers and What Befell Them, 1975
• Georgia from Rabun Gap to Tybee Light , 1978
• Far-Flung and Footloose, 1979
• The New Yorker and Me, 1979
• Jock: The Life and Times of John Hay Whitney , 1981
• The Staffs of Life, 1985
• The Problem Solvers: A History of Arthur D. Little, Inc., 1986
• Year of Change: More about the New Yorker and Me, 1988.
• Supermarketer to the World: The Story of Dwayne Andreas, 1991.