What is the abbreviation for captain?

The abbreviation for captain is "Capt." It is typically used as a title preceding a person's name to indicate their rank in the military or in certain professions such as airline pilots, ship captains, or police officers. The abbreviated form of captain is commonly used in official documents, salutations, and address labels. It is important to note that the abbreviation for captain can vary depending on the context, for example, in sports, the abbreviation for captain is usually "C."