Libby, Willard Frank (1908-1980), a United States chemist. He received the 1960 Nobel Prize in chemistry for developing, in 1947, the radiocarbon method of determining the age of objects thousands of years old.

Libby was born in Grand Valley, Colorado. He received a Ph.D. in chemistry from the University of California at Berkeley in 1933, and taught there until 1941. At Columbia University, 1941-45, Libby worked on developing the atomic bomb. He taught at the University of Chicago, 1945-54, and was a member of the Atomic Energy Commission, 1954-59. From 1959 until his death he was on the faculty of the University of California at Los Angeles.