The dictionary definition of reason is “the mental powers concerned with forming conclusions, judgments, or inferences”, or “sound judgment; good sense.” The intersection of reason and creationism is understandably a small one, when viewed in this manner. But reason is also defined as the basis or cause of something, as when we speak of the reason for doing something. A reason can also be a statement explaining a belief or action. Viewed this way, of course creationists have reasons for their beliefs – but the beliefs rarely have much to do with the other kinds of reason, reflecting empirical evidence and science. Using examples from creation science and intelligent design, I will explore “reason and creationism”.