- O caraminguá
- O encontro da cidade criança com o sertão menino
- O fantasma fecha os olhos
- O gigante do Maracanã
- O Karaíba
- O menino do dedo invisível
- O menino no alto da montanha
- O ovo do elefante
- O que eu vi por aí
- O quintal que ainda tínhamos
- O sinal do pajé
- O sonho de Borum
- Oakland Tales
- Ocell blanc
- Odd One Out
- Of Curses and Kisses
- Of Mice and Men
- Of Princes and Promises
- Off the Map
- Off-Color
- Off-Road Harry
- Oh, Dear!
- Oh, Freedom!
- Oh, Rats!
- Okami - Aus Feuer geboren
- Ola Shakes It Up
- Old Babylonia Children's Middle Eastern History Books
- Old Ramon
- Om ett missfoster
- On Pins and Needles
- On Pointe All Day Long
- On the Come Up (versione italiana)
- On the Flip Side
- On the Hook
- On the Road to Mr. Mineo's
- Once Upon A Time In America
- Once Upon A Time In Venice
- Once Upon a Time Long, Long Ago
- Onder de radar
- One Bird
- One Crazy Summer
- One Half from the East
- One Italian Summer
- One Of The Good Ones
- One of the Good Ones
- One Paris Summer
- One Shadow on the Wall
- One Shark, No Swim
- One Small Thing
- One Speck of Truth
- One Thing Stolen
- One Trick Pony
- One True Loves
- One True Way
- One Truth, No Lie
- Ones and Zeroes
- Ongehoorzaam
- Onibi: Diary of a Yokai Ghost Hunter
- Onkel Peppi und andere Geschichten
- Ontsnapt
- Onwaachige the Dreamer
- Onyeka and the Academy of the Sun
- Oog in oog
- Operación Escudo
- Opie Jones Talks to Animals
- Opération Dreamteam
- Oracles' Tale
- Orchards
- Origens
- Origins - A Guardian Anthology
- Orión
- Orleans
- Orphan, Monster, Spy
- Orphea Proud
- Os orixás sob o céu do Brasil
- Otages de la nature
- Other People's County
- Other Words for Home
- Otis
- Our American Cousin
- Our Little Arabian Cousin
- Our Little Brazilian Cousin
- Our Little Canadian Cousin
- Our Little Cossack Cousin
- Our Little Cuban Cousin
- Our Little Czecho-Slovak Cousin
- Our Little Danish Cousin
- Our Little Dutch Cousin
- Our Little English Cousin
- Our Little Finnish Cousin
- Our Little French Cousin
- Our Little German Cousin
- Our Little Hawaiian Cousin
- Our Little Hindu Cousin
- Our Little Hungarian Cousin
- Our Little Irish Cousin
- Our Little Korean Cousin
- Our Little Persian Cousin
- Our Little Polish Cousin
- Our Little Porto Rican Cousin
- Our Little Quebec Cousin
- Our Little Roumanian Cousin
- Our Little Russian Cousin
- Our Little Scotch Cousin
- Our Little Servian Cousin
- Our Little Swedish Cousin
- Our Little Swiss Cousin
- Our Little Turkish Cousin
- Our Only May Amelia
- Our Violent Ends
- Our Wayward Fate
- Our Young Folks
- Out Now
- Out of Bounds
- Out of Left Field
- Out of Nowhere
- Out of Place
- Out of Shadows
- Out of the Dust (Scholastic Gold)
- Out of the Hitler Time trilogy: When Hitler Stole Pink Rabbit, Bombs on Aunt Dainty, A Small Person ...
- Out Of The Silent Planet
- Out There
- Outbreak
- Outrun the Moon
- Overspoeld
- Où es-tu Yazid ?