Finn person fra Røa
- Tine Ellen Bakke Oppedal
- Eva Elisabeth Opsahl
- Kirsten Ingeborg Opsahl
- Tor Opsahl
- Marie Opsahl Resvoll
- Astrid Opsal
- Kari Opsal
- Kirsten Opsal
- Bendik Rønning Opstad
- Jelena Opstad
- Lisbeth Opsvik
- Laura Sophie Opsvik-Willoch
- Linn Merethe Ora
- Ebbe Ording
- Tana Kari Haugen Ording
- Øysten Mikal Ore
- Daria Orekhva
- Ingvild Kristine Orheim
- Bjørg Helt Ormerud
- Stein Ormholt
- Silje Anita Ormåsen
- Otto Markvard Orning
- Sissel Sellevold Orning
- Tanja Orning
- Britt Marie Orveland
- Daniel Andrzej Orylski
- Silje Skjelsvik Os
- Silje Bernhoft Osa
- Didrik Oscar-Andersen
- Cecilia Osei-Tutu
- Kirsten Osen
- Lars Oskarsen
- Abdirahman Ahmed Osman
- Abukar Haji Osman
- Ahmed Abyan Osman
- Hodon Ahmed Osman
- Mohamed Abukar Osman
- Sahro Osman
- Karin Osmundsen
- Siri Osnes
- Kateryna Ostapchuk
- Anette Helen Osvik
- Katrine Oswald Bjørneset
- Elsa Pauline Oterhals
- Andreas Kleppe Oterholt
- Camilla Kleppe Oterholt
- Marte Bjørnaa Otnes
- Vidar Otnes
- Henrik Ottersbo
- Johannes Emanuel Ottersen
- Linn Iren Ottersen
- Kari Elisabeth Otterstad
- Jan Henrik Gunneng Ottesen
- Preben Skrede Ottesen
- Simen Rudsengen Ottesen
- Agnes Evelyn Ougland
- Maria Botnen Ougland
- Camilla Oulie Eskidlsen
- Birgitte Ouren Gjerdrum
- Ståle Ovenberg
- Gro Merete Overrein
- Sigurd Eide Ovesen
- Siv Helen Ovesen
- Cecilie Ovrum
- Jan Tomas Owe
- Kirsti Celine Owe
- Sebastian Owe
- Tobias Luis Owe
- Odd Owren
- Sissel Marie Owren
- Pawel Ozygala
- Lukasz Pachocki
- Olav Jozef Pacyna
- Jan Pahle
- Ingun Pahr
- Jane Frances Pajo
- Saman Pakdel
- Inger Marie Pal
- Kristin Pal
- Jeanninne Eivron Palacios
- Akash Palanivel
- Akshaya Shree Palanivel
- Jakub Jozef Pálenik
- Nadezhda Paliy
- Sverre Gunnar Palm
- Ellinor Palmstrøm
- Robert Erik Palmstrøm
- Natasha Panjkovic
- Zhasmina Lyubomirova Panteleeva
- Kofi Opoku Papa
- Julia Pape
- Gerd Pape-Saxebøl
- Alexander Pappos
- Heesoo Park
- Gustavo Parra de Andrade
- Zahida Parveen
- Nelu Pasat
- Rashmikant Ishverbhai Patel
- Vaibhav Shriram Patil