Chief may refer to:

Title or rank

Military and law enforcement

* Chief master sergeant, the ninth, and highest, enlisted rank in the U.S. Air Force and U.S. Space Force *

Chief of police Chief may refer to: Title or rank Military and law enforcement * Chief master sergeant, the ninth, and highest, enlisted rank in the U.S. Air Force and U.S. Space Force * Chief of police, the head of a police department * Chief of the boa ...

, the head of a police department *

Chief of the boat The chief of the boat (COB) is an enlisted sailor on board a U.S. Navy submarine who serves as the senior enlisted advisor to both the Commanding Officer (CO) and Executive Officer (XO). Overview The COB assists with matters regarding the goo ...

, the senior enlisted sailor on a U.S. Navy submarine *

Chief petty officer A chief petty officer (CPO) is a senior non-commissioned officer in many navies and coast guards. Canada "Chief petty officer" refers to two ranks in the Royal Canadian Navy. A chief petty officer 2nd class (CPO2) (''premier maître de deuxi� ...

, a non-commissioned officer or equivalent in many navies * Chief warrant officer, a military rank

Other titles

Chief of the Name The Chief of the Name, or in older English usage Captain of his Nation, is the recognised head of a family or clan (''fine'' in Irish and Scottish Gaelic). The term has sometimes been used as a title in Ireland and Scotland. In Ireland In Eliza ...

, head of a family or clan *

Chief mate A chief mate (C/M) or chief officer, usually also synonymous with the first mate or first officer, is a licensed mariner and head of the deck department of a merchant ship. The chief mate is customarily a watchstander and is in charge of the shi ...

, or Chief officer, the highest senior officer in the deck department on a merchant vessel *

Chief of staff The title chief of staff (or head of staff) identifies the leader of a complex organization such as the armed forces, institution, or body of persons and it also may identify a principal staff officer (PSO), who is the coordinator of the supporti ...

, the leader of a complex organization * Fire chief, top rank in a fire department *