What college degree is required to become an engineer?

There's no single college degree required to become an engineer. However, almost all engineering jobs require a Bachelor of Science (B.S.) degree in engineering or a closely related field. The specific field will depend on the type of engineering (e.g., mechanical engineering, electrical engineering, civil engineering, chemical engineering, etc.). A few engineers may have a Master's degree, but that's usually a further step in specialization or for advancement.