Druid can refer to:

• a priest of the religion of the ancient Celts, see Druidry.
• a rank within the Gorsedd of Bards.
• Neo-druidism, a modern Neo-pagan religious practice.
• in role-playing games, a druid is a character that represents a magic-user, often with the ability to transform into animals or harness certain animal attributes.
• a computer game by Firebird, see Druid (computer game) .

Archdruid is High Priest of the Druidic fatih; a spiritual and political leader, similar to the Merlin (sometimes used for environmentalist David R. Brower.