Finn person fra Fjerdingby
- Gisele Oliveira
- Alexander Robin Martin Oliverot
- Alexander Robin Martin Oliverot
- Aleksander Olsen
- Anne-Lise Olsen
- Anniken Jenssen Olsen
- Bente Emilie Olsen
- Brit Kihlberg Olsen
- Christoffer Lie Olsen
- Gjermund Fjeld Olsen
- Jan Olav Olsen
- Kate Olsen
- Kine Sabel Olsen
- Leif Roar Olsen
- Maren Fjeld Olsen
- Mari Abildgaard Olsen
- Marianne Angel Olsen
- Marius Olsen
- Marius Olsen
- Martine Olsen
- Noreen Olsen
- Odd Charles Carl-Johan Olsen
- Peder Fjeld Olsen
- Per-Ivar Olsen
- Ragnhild Botner Olsen
- Rene Olsen
- Robert Olsen
- Stian Olsen
- Svein Olsen
- Thore Olsen
- Trine Fjeld Olsen
- Trond Steinar Olsen
- Trude Kristoffersen Olsen
- Venke Olsen
- Vigdis Olsen
- Vivian Tøen Olsen
- Brit Olsen-Bjerke
- Kenneth Olsen-Bjerke
- Elisabet Lund Olsgård
- Nicoline Marie Olstad
- Odd Asbjørn Olufsen
- Samir Omar
- Larry Omer
- Yousif Bakhit Omer
- Ida Onstad
- Tonje Onstad
- Jirarat Ontakrai
- Siri Rambøl Opheim
- Lilliana Rolness Ophus
- Augustina Opoku-Agyemang
- Laila Anita Myrvold Opsahl
- Trond Opsahl
- Henning Opseth
- Madelene Finstad Orderud
- Amelia Kjelsås Orlikowski
- Christine Kjelsås Orlikowski
- Lukasz Orlikowski
- Sigurd R Orre
- Sigurd Reidar Orre
- Mona Elisabet Orud
- Jürgen Stähler Oslo Taxi
- Fartun Osman
- Abdalla Khidir Othman
- Hamdullah Othman
- Torill Otnes
- Inger Beate Otterlei
- Thomas Otterstad
- Jakob Ottervig
- Inger Vivian Ottesen
- Werner Andre Ottesen
- Erik Ottinsen
- Tove Ingebjørg Ottinsen
- Andrea Ottone
- Ove Ottosen
- Veronica Bræin Ottosen
- Meriem Ouerchfani
- Annette Ovesen
- Veronika Ozogren
- Toomas Paiv
- Ann-Catrin Paixao
- Bente Fagernes Paixao
- Sergio Rodrigo Palencia
- Arild Palm
- Miguel A Pesantes Palma
- Nikki Palmstrøm
- Nikki Palmstrøm
- Kristin Hronn Palsdottir
- Macarena Illanes Pareglio
- Irene Pasqua
- Garry Tilcagan Patal
- Isaiah Paul
- Elisabeth Paulsberg
- Morten Paulsberg
- Brit Paulsen
- Johan Albert Paulsen
- Kjetil Paulsen
- Martin Paulsen
- Rinesa Pavataj