What is the first officer rank in the Marine Corps?

The first officer rank in the Marine Corps is 2nd Lieutenant. In military structure, the rank of 2nd Lieutenant is designated as the entry-level officer rank, serving as the initial step for individuals who have completed Officer Candidate School or the Naval Academy. This rank is critical because it is where new officers begin their leadership roles, receive assignments, and start their military careers.

The progression of officer ranks typically places 2nd Lieutenant at the bottom of the officer hierarchy, followed by 1st Lieutenant, Captain, and then Major. Each subsequent rank reflects increased experience, responsibility, and leadership authority. Understanding this structure is important for recognizing how leadership, training, and responsibilities evolve as officers advance through their careers.