At what pay grade does a Major in the Marine Corps rank?

A Major in the Marine Corps holds the pay grade of O-4. This rank is situated above a Captain, who is at the O-3 pay grade, and below a Lieutenant Colonel, who holds the O-5 pay grade. The designation O-4 reflects the official classification system used by the U.S. military to categorize officer ranks based on their levels of responsibility, experience, and leadership. Having a clear understanding of these pay grades is essential for recognizing a Major's position within the organizational hierarchy of the Marine Corps.