Caspar Whitney (September 2, 1864 – January, 18 1929) was an American author, editor, explorer, and war correspondent. He originated the concept of the All-American team in college football in 1889 when he worked for Harper's Magazine.

From 1900, he was editor-in-chief of the monthly Outing magazine, which promoted the outdoors and sporting pursuits, as well as a good deal of adventure fiction; authors included Jack London and Clarence E. Mulford. He was a founding member of The Explorers Club (1904) after expeditions in North and South America. He declared bankruptcy in 1910.

As a sports journalist he was an advocate of athletic amateurism and was a member of the International Olympic Committee (1900–1905) and the American Olympic Committee (President 1906–1910). He wrote on a wide range of subjects including big-game hunting, inter collegiate sporting contests (especially football and baseball), amateur versus professional contests, and the Olympic games. In the early 1900s, he edited "The American Sportsman's Library," a quality series of 16 volumes.

Whitney testified in a lawsuit against him that he earned a salary of $8,000 (nearly $200,000 inflation adjusted to 2008) for editing Outing and $1,500 (about $35,000 inflation adjusted) for editing the American Sportsman's Library .

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