CVO may refer to:

• Chief visionary officer, an executive function in a company
• Commander of the Royal Victorian Order, membership of a British order of chivalry
• Chief Veterinary Officer
• Circumventricular organs, positioned around the ventricular system of the brain
• Common velocity obstacle, a type of velocity obstacle
• Corvallis Municipal Airport, Oregon, United States (by IATA airport code)
• Harley-Davidson CVO, a category of limited-edition Harley-Davidson motorcycles produced by its Custom Vehicle Operations group
• Cascades Volcano Observatory

• Melecio Arranz
• Meledin
• Meledis Formation
• Melee attack
• Melee-FC
• Melee (gaming)
• Melee (tournament)
• Melee (warfare)
• Mele-Fila
• Mele-Fila language
• M. elegans (disambiguation)
• Melegfoldvar
• Melegföldvár
• Melegnano railway station
• Melegrivirus A
• Melegszamos
• Melegvolgyitanya
• Melegvölgyitanya
• Meleh
• Meleh Abgir
• Melehaneh
• Meleh Avareh
• Mele (Hawaiian term)
• Meleh Beyglar
• Meleh Chah Shureh