What is the designation for a Captain in the Marine Corps in terms of pay grade?

The designation for a Captain in the Marine Corps is O-3, which represents the pay grade assigned to that rank. In the military pay system, ranks are categorized into pay grades denoted by an 'O' followed by a number. The rank of Captain is a critical leadership position within the Marine Corps, typically serving as a company commander or in other critical leadership roles. Understanding the pay grade helps in recognizing the level of responsibility and authority associated with that rank, which is part of the broader military structure.

For context, O-2 refers to a First Lieutenant, which is one pay grade below Captain, while O-4 indicates a Major, which is one pay grade above. Lastly, O-5 is a Lieutenant Colonel, further emphasizing the progression of ranks in command and responsibilities. Recognizing these distinctions is fundamental for understanding the hierarchy and organizational structure within the Marine Corps.