Authors starting with O
- Óscar Contardo
- Oscar Estefania
- Oscar Hammerstein
- Oscar J. Friend
- Òscar Julve
- Òscar Monterde Mateo
- Óscar Palmer Yáñez
- Oscar Popa
- Óscar Ramírez Molina
- Óscar Ramírez Molina
- Óscar Villán Seoane
- Oscar Wilde
- Oscar Zeta Acosta
- Os Guinness
- O. S. Hawkins
- Osip Mandelʹshtam
- O. S. Kalkat
- Osvaldo Lamborghini
- Osvaldo Sosa Cordero
- Osvald Sosa Cordero
- Oswald Spengler
- Oswyn Murray
- Otaro Maijo
- Otegha Uwagba
- Otfried Preußler
- Otha Richard Sullivan
- Otha Richard Sullivan
- O the Oprah Magazine
- Others
- Otilia Coronado Lopez
- Otis Adelbert Kline
- Otis Williams
- O. T. Nelson
- Otsuichi
- Otsuji
- Otsuka Eiji Jimusyo
- Ottessa Moshfegh
- Otto Bettmann
- Otto Binder
- Otto Heinrich Kühner
- Otto Maddox
- Otto O. Binder
- Otto Penzler
- Otto Schönberger
- Otto Wuth
- Oualid Hamdi
- Ouida
- Oulipo (Association) Staff
- Ousmane Sembène
- Outside Magazine
- Ouzhongru
- Ovid
- Ovidio
- O. V. Vijayan
- Owen Beattie
- Owen Dodson
- Owen Hill (undifferentiated)
- Owen Johnson
- Owen K. C. Stephens
- Owen King
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