Byron Leo Ristvet was born on August 22, 1947, in Tacoma, Washington. Byron married Linda R. (née Duco) on February 15, 1975, and they had two children: Lauren and Matthew.

Ristvet obtained a bachelor of science degree in geology from the University of Paget Sound in 1969. He then obtained a doctor of philosophy degree in geology from Northwestern University in 1977.

Ristvet was active in the United States Air Force from 1973-1977 and then part of the reserves from 1977-1997. He retired as a lieutenant colonel.