Officium may refer to:
- Officium is a Latin word with various meanings in Ancient Rome, including "service", "(sense of) duty", "courtesy", "ceremony" and the like
- The Divinum Officium is the official set of daily prayers prescribed by the Roman Catholic Church to be recited at the canonical hours by the clergy, religious orders, and laity
- The Sanctum Officium was the name of the department in the Roman Curia which oversaw Catholic doctrine
- Officium Defunctorum is a musical setting of the Office of the Dead, composed by the Spanish Renaissance composer Tomás Luis de Victoria in 1603
- Officium Triste, Doom metal band from Rotterdam, The Netherlands
- Officium (album) an album by Norwegian saxophonist Jan Garbarek, featuring The Hilliard Ensemble