John Batterson Stetson Jr. was an American diplomat and businessman. He served as the United States Minister to Poland from 1925 to 1929.

The son of famed hatmaker John Batterson Stetson, John Stetson Jr. was born on October 14, 1884, in Philadelphia. He studied at William Penn Charter School, and later at Harvard University, graduating with a Bachelor of Arts in 1907, one year behind his original graduating class, due to illness.

Stetson married Ruby F. Carlisle in June 1907. They had two daughters and two sons: Stuart Carlisle, a Marine Corps officer killed in a plane crash in 1941; and John B. Stetson III, a National Guardsman who also predeceased his father, in 1944.

Stetson also contributed, inadvertently, to an exhibit at the American Museum of Natural History in 1921: a chunk of limestone, 40 pounds (18 kg), still in the shape of a Stetson hat; the result of an impulsive throw twenty years before into Fossil Creek.

Stetson died in his sleep on November 15, 1952, at his home in Elkins Park, Pennsylvania.