Finn person fra Nordstrand
- Roberth Svendsen Offerdal
- Arne Ofstad
- Bjørn Ofstad
- Geir Ofstad
- Marianne Wilmar Oftedahl
- Sunniva Franciska Oftedahl
- Terje Anders Oger
- Lilith Ohlsson
- Anne Berit Austheim Ohme
- Silje Ohnstad
- Bård Okkelmo
- Lisbeth Signe Okkelmo
- AM Okna
- Bjørn Oksnes
- Sven Ove Oksvik
- Hilde Olafsen
- Roger Olafsen
- Simen Tore Olafsen
- Thomas Olafsen
- Thomas Olaisen
- Mario Gomez Olalla
- Anne Margrete Tangen Olaussen
- Martin Olaussen
- Eirik Olavson
- May Evelyn Carlsson Olavson
- Per Olavson
- Magnus Olden
- Kasper Old Jensen
- Oleksandra Oliinyk
- Mats Olimb
- Alicia Evelina Oliversson
- Anne-Karin Olsby
- Alina A Z Olsen
- Andrine Olsen
- Anette Olsen
- Anne-Lise Olsen
- Arild Olsen
- Berit Lise Olsen
- Bjørn Thore Olsen
- Eina Ingrid Olsen
- Elisabeth Lykke Olsen
- Emilie Vathne Olsen
- Eva Olsen
- Even Olsen
- Herman Vathne Olsen
- Jan Andre Olsen
- Jarl Torris Olsen
- Jeanette Olsen
- Kaja Olsen
- Karin Synnøve Olsen
- Kine Espelid Olsen
- Laila Olsen
- Linda Helen Olsen
- May Lisbeth Olsen
- Nina Schyberg Olsen
- Odd Erling Olsen
- Oddvar Hillestad Olsen
- Peter Johan Kaland Olsen
- Pia Hasdahl Olsen
- Roar Olsen
- Sebastian Olsen
- Tone Fugland Olsen
- Trine Else Olsen
- Victoria Elise Olsen
- William Olsen
- Willy Olsen
- Toril Henriksen Olset
- Bo Tommy Olsson
- Lena Mari Olsson
- Sven Olof Magnus Olsson
- Adele Olsson Rasmussen
- Marit Jannecke Olstad
- Pawel Olszewski
- Torstein Johannes Olufsen
- Olav Oma
- Rajab Omar
- Hans Andreas Omland
- Solveig Helene Omsted
- Tobias Opedal
- Kjell Håkon Opheimshaugen
- Tonje Gudmundsdatter Stenersen Opheimshaugen
- Anne-Mette Platou Ophus
- Morten Ophuus
- Leif-Victor Oppedal
- Marit Waage Oppedal
- Randi Oppedal
- Ylva Oppedal
- Erica Frisk Oppheim
- Adrian-Lucian Oprea
- Mirela Oprea
- Anniken Opsahl
- Jørgen Mæland Opsahl
- Sunniva Opsahl
- Tonette Helene Mæland Opsahl
- Berit-Marie Opsata
- Anne Marit Opseth
- Janlee Esmeralda Oracion
- Anders Orerød
- Mari Orfjell