Luther Sheeleigh Cressman (October 24, 1897 – April 4, 1994) was an American field archaeologist, most widely known for his discoveries at Paleo-Indians sites such as Fort Rock Cave and Paisley Caves, sites related to the early settlement of the Americas.
Cressman was born outside of Pottstown, Pennsylvania, the son of a physician. He was ordained an Episcopal priest in 1923, but feeling doubts about his vocation, began studying sociology and anthropology at Columbia University in New York. He received his Ph.D. from Columbia in 1928, and that same year, he left the priesthood.
In 1929, he took a position as Professor of Sociology at the University of Oregon. The Department of Anthropology was founded by him six years later. His first hire for the department was Homer Barnett. Cressman was the chair of the department from 1935 until his retirement in 1963.
His most significant discovery came in 1938, when he discovered a pair of perfectly preserved shredded sagebrush bark sandals at Fort Rock in Oregon that were radiocarbon dated from 10,500 to 9,300 years old, making them the oldest footwear ever discovered.
As late as 1962 he taught an Intro to Anthropology with another professor. At the first lecture the younger professor said he struggled with how to address Dr. Cressman. They were peers by PhDs so it would have been all right to use his first name but since Cressman was greatly senior he said it didn't seem right to call him Lou, and left it there. Dr. Cressman pointed out he didn't tell us what he called him. Dr. Cressman said, "He calls me, 'Doc'."
His autobiography A Golden Journey: Memoirs of an Archaeologist was awarded the 1989 Oregon Book Award for literary nonfiction.