Finn person fra Sandvika
- Tom-Vegard Olufsen
- Torgeir Oma
- Abdikaffar Hassan Omar
- Adiba Omar
- Ali Omar
- Ashti Ahmad Omar
- Atiqullah Omar
- Eihab Waleed Omar
- Ibrahim Hashi Omar
- Letsji Omarov
- Karen Johanne Grønbugt Omdal
- Faruk Omerhodzic
- Feriha Omerhodzic
- Mette Wichmann Brandsgård Omfjord
- Kristine Saltermark Omholt
- Dag Omholt-Jensen
- Khair-Ullah Omidi
- James July Desierto Ong
- Vadim Onofrei
- Kevin Parama Onprasert
- Kari Onshus
- Marit Linnerud Onstad
- Sissel Onstad
- Vibeke Onstad
- Henrik Opaker
- Katrine Brevik Opdahl
- Birgitte Gunnhild Egilsson Opdal
- Liv Randi Opdal
- Sigurd Helle Opedal
- Alf Erland Opheim
- John Olav Opland
- Gabriel Oppegaard
- Kvinna Oppegaard
- Marek Oprzanski
- Bo Mikkel Opsahl
- Edward Henrik Opsahl
- Gunnar Opsahl
- Hans Petter Opsahl
- Karin Opsahl
- Tor Opsahl Myklebust
- Stein Opsal
- Karin Opås
- Odd Håkon Gustav Opås
- Marianne Opaas
- Maria Erichsen Ordemann
- Aileen Orocay
- Esteban Zuluaga Orozco
- Madelaine Svanøe Orskaug
- Cecilie Ortega
- Juan Carlos Ortega
- Nina Orucevic
- Sladana Orucevic
- Zlatko Orucevic
- Erlend Osborg
- Stig Tore Ose
- Harald Oskarsen
- Fahad Ibrahim Osman
- Layla Abdi Osman
- Mohammad Mostafa Osman
- Sundus Osman
- Zofia Ostrowska
- Zofia Ostrowska
- Magnus Ostrowski
- Espen Reymorth Osufsen
- Siv Oterhals
- Espen Otnem
- Magnhild Sofie Otnes
- Britt Synnøve Otterhals
- Øivind Jostein Otterlei
- David Elia Ottersen
- Anne Grethe Ottesen
- Sidsel Tambs-Lyche Ottesen
- Stig Ottesen
- Essiya Oulkadi
- Oumarbek Oumalatov
- Georg Arne Ovesen
- Karin Ovesen
- Kathe Fornebo Ovesen
- Mikkel Fornebo Ovesen
- Elisabeth Oxfeldt
- Anita Paduch Ozarowski
- Filip Ozarowski
- Jan Ozarowski
- Mia Ozarowski
- Martins Ozols
- Viktors Ozols
- Dawen Pang
- Fatemeh Panjwani
- Johan Park
- Anthony John Parkins
- Khalida Parveen
- Nisha Parvez
- Joao Paulo Daniel Pasi
- Kevin Patel
- Parth Paul
- Finn-Bjørn Paulsen
- Jorunn Åse Paulsen
- Liz Paulsen
- Matilde Paulsen