Counselor or counsellor may refer to:

A professional

In diplomacy and government

Counsellor of State Counsellors of State are senior members of the British royal family to whom the monarch can delegate royal functions through letters patent under the Great Seal, to prevent delay or difficulty in the dispatch of public business in the case ...

, senior member of the British royal family to whom the Monarch can delegate some functions in case of unavailability * Counselor (diplomat), a high-ranking diplomat * Counselor of the United States Department of State, confidential adviser to the U.S. Secretary of State * Navy Counselor in the United States Navy * State Counsellor of Myanmar, former de facto head of government of Myanmar

In education and social work

* Camp counselor, or "cabin leader", adult supervisor in summer camps ** Counselor-in-Training, training program for camp counselors * School counselor, also "guidance counselor" or "educational counselor"

Elsewhere

* Credit counseling professional help in the US, "debt counsellor" in the UK * Counselor at law, used interchangeably with "lawyer" ** Counsel, lawyer in certain jurisdictions * Mental health counselor ** Licensed professional counselor ** Grief counseling, Grief counselor

Arts, entertainment, literature, media

* ''Counselor'', a magazine published by the Advertising Specialty Institute * "Counselor", a song by In Fear and Faith from the album, ''Imperial (In Fear and Faith album), Imperial'' * "Marriage Guidance Counsellor", a Monty Python sketch * ''The Counselor'', a 2013 American crime thriller film * ''De optimo senatore'' (; also known as "The Counsellor"), a 1568 book

Others