William A. Libbey III (March 27, 1855 – September 6, 1927) was an American professor of physical geography at Princeton University.

He was twice a member of the U.S. Olympic Rifle Team, and rose to the rank of colonel in the New Jersey National Guard.

[3] The next year he arranged for the manufacture of 1,000 yards of orange and black ribbon and proceeded to sell it, from the Grand Union Hotel, at an intercollegiate regatta in Saratoga, New York as "Princeton's colors."

In 1880 he was appointed as director of the Elizabeth Marsh Museum of Geology and Archaeology as well as an associate professor to teach physical geography.

After great exertion, he spent a couple of hours on the mesa top and concluded that nothing was there and that it had never been occupied.