Crawford Hallock Greenewalt Jr. (June 3, 1937 – May 4, 2012) was an American classical archaeologist at the University of California, Berkeley who made contributions to the study of Lydia through his excavations at Sardis.^[1][3]

Greenewalt was the son of Crawford Hallock Greenewalt, a chemical engineer and later president of DuPont, and Margaretta L. Greenewalt.^[2] He had one brother, David Greenewalt, and one sister, Nancy G. Frederick.^[2] He attended the Tower Hill School, received a B.A. from Harvard University in 1959, and a Ph.D. in Classical Archaeology from the University of Pennsylvania in 1966.^[1] Greenwalt died of a brain tumor in 2012.^[1]

Greenewalt first showed in interest in archaeology at age eight.^[1] While an undergraduate at Harvard, Greenewalt worked at the Sardis excavation, where he became known for his ability to crawl through the narrow tunnels constructed by earlier tomb robbers.^[3] After graduating in 1959, Greenewalt joined the Sardis excavation as a staff photographer.^[1][3] Greenewalt's Ph.D. thesis was on the Lydian pottery, like those recovered at the Sardis excavation.^[3] Greenewalt worked on the Sardis excavation every summer from 1959 to 2011.^[1][3] In 1976 he was made the field director of the excavation, a position he held until 2007 when he turned it over to Nicholas Cahill.^[1][3]

Greenewalt was a member of the American Philosophical Society, and an honorary member the German Archaeological Institute and Austrian Archaeological Institute.^[1] In 1993 he was awarded the Henry Allen Moe Prize in Humanities by the American Philosophical Society for his paper "When a Mighty Empire Was Destroyed" and for his work on reconstructing the history of Lydia.^[1] In 2012 he was awarded Archaeological Institute of America's Bandelier Award for Public Service to Archaeology for his work at Sardis.^[5]

The research library of archaeology at Ege University, Izmir, to which Greenewalt had left his private library, was named "Greenewalt Library" in 2015.^[6]