Which U.S. Navy rank is higher: O-4 or O-5?

The rank O-5 is higher than O-4 in the U.S. Navy's officer ranking system. In military terminology, the ranks are categorized by a numbering system, where O-1 represents the lowest officer rank (Ensign) and the numbers increase with higher ranks.

Specifically, O-4 refers to the rank of Lieutenant Commander, while O-5 denotes the rank of Commander. With each increase in the number, the level of responsibility, leadership, and pay grade also increases. Commanders (O-5) typically have more experience and authority compared to Lieutenant Commanders (O-4). Thus, O-5 signifies a higher standing within the Navy's hierarchical structure.