A constable is a person holding a particular office, most commonly in law enforcement. The role and powers of a constable can vary significantly depending on the jurisdiction. Generally, constables are law enforcement officers, but their duties and rank differ between countries and regions. Etymologically, the term "constable" derives from Old French and Latin origins, initially referring to an officer responsible for the stables of a lord or monarch. Over time, it developed into various roles, including high military ranks and officers of state in medieval Europe. In modern times:
- In the United Kingdom, Commonwealth countries, and some parts of Europe, a constable is typically the lowest rank of a police officer. All sworn police officers may be referred to as constables.
- In the United States, a constable is often an elected peace officer with jurisdiction usually smaller than that of a sheriff. Their duties include serving legal documents such as subpoenas, eviction notices, and warrants, and they may have limited law enforcement powers in some states.
- In some areas like Texas and Arizona, constables are licensed peace officers who perform a mix of law enforcement functions and court-related duties, such as serving legal papers, acting as bailiffs, and providing security for courts.
Historically, a constable could also be the officer in charge of the defense of a castle, with the equivalent military title being marshal. In summary, a constable is typically a local law enforcement or peace officer, often with duties focused on serving legal documents, court security, and minor law enforcement functions depending on the jurisdiction.