Which rank is the highest in the Marine Corps enlisted ranks?

The rank that is the highest in the Marine Corps enlisted ranks is the Sergeant Major of the Marine Corps. This position is not only the highest enlisted rank but also serves as the senior enlisted advisor to the Commandant of the Marine Corps. The holder of this rank has significant influence in shaping enlisted policies and often represents the interests and concerns of all enlisted Marines.

In contrast, while Master Gunnery Sergeant is an esteemed rank with significant responsibilities, it does not hold the same level of authority and representational role as the Sergeant Major of the Marine Corps. Gunnery Sergeant and Staff Sergeant are lower ranks within the hierarchy. Each of these ranks has important duties and responsibilities, but they do not surpass the rank of Sergeant Major of the Marine Corps in terms of seniority and influence within the Marine Corps structure.