Boion may refer to:

• Boium, a town of ancient Doris, in Greece
• Bouyon, a town of France
• Voio, a town of Greece

• Marcus, Washington
• Marcus Welby
• Marcus Welby M.D.
• Marcus Welby, M.D.
• Marcus Wesson
• Marcus Whitman
• Marcus Wiebusch
• Marcus Zuerius van Boxhorn
• Marc-Vivien Foe
• Marc-Vivien Foé
• Marc Wallenberg
• Marc Wallice
• Marc Warren
• Marc Webb
• Marc Weiner
• Marc Weissbluth
• Marc William Buie
• Marc Wilmore
• Marc Wilmots
• Marc (wine)
• Marc W. Kirschner
• Marcy Kaptur
• Marcy Levy
• Marcy, New York
• Marcy Playground