Charles J. Cazeau (1931-1999) was an American geologist and writer.
Cazeau was Professor emeritus of geology for the University at Buffalo. He was a fellow of the Committee for Skeptical Inquiry and a contributor to Skeptical Inquirer.
His book co-authored with Stuart D. Scott Exploring the Unknown: Great Mysteries Reexamined (1979) was a debunking of pseudohistorical and pseudoscientific claims such as ancient astronauts, Bigfoot, Loch Ness Monster and Immanuel Velikovsky's catastrophism.