Custos is the Latin word for guard.
Titles
- Custos rotulorum ("keeper of the rolls"), a civic post in parts of the United Kingdom and in Jamaica
- Custos (Franciscans), a religious superior or official in the Franciscan Order
- Custos (Under-sacristan), a Roman Catholic office
Other
- AB Custos, a Swedish investment company
- Custos, a fictional secret organization in the Japanese film series Towa no Quon
Music
- Custos, the latin word for a Direct (music symbol)
Proverbs
The nominative and accusative plural form custodes is used in the proverbial phrase Quis custodiet ipsos custodes?, "Who has custody of the custodians?".