Enlistment district
| Name | Details |
|---|---|
| Karl Oskar Olsen | Born December 17, 1914 in Tveit |
| Kjell Gunerius Olsen | Born December 20, 1921 in Kristiansand |
| Gunnar Olsen Lidi | Born September 3, 1915 in Bygland |
| Odd Gunerius Olsen | Born November 22, 1924 in Kristiansand |
| Olaf Odmar Olsen | Born January 6, 1906 in Greipstad, Vest- Agder |
| Ole Jørgen Olsen | Born May 25, 1886 in Oddernes |
| Oscar Inius Olsen | Born November 22, 1881 in Valle sogn, VA. |
| Oskar Olsen | Born March 25, 1912 in Kristiansand |
| Otto Julius Olsen | Born July 1, 1841 in Christiansand |
| Peder Sigurd Olsen | Born July 7, 1918 in Søgne |
| Sigurd August Olsen | Born August 1, 1893 in Kristiansand |
| Svend Olsen | Born September 8, 1836 in Fjære |
| Sverre K. Olsen | Born December 12, 1897 |
| Olsen, Trygve Hartford | Born March 7, 1925 |
| Willy Olsen | Born June 13, 1920 in Kristiansand |
| D/S Onsala | Build year 1857 |
| Brigg Ora & Labora | Build year 1841 |
| Peder Andreas Ording | Born July 6, 1914 in Kristiansand |
| Bark Orion | Build year 1856 |
| Galeas Ornan | Build year 1859 |
| M/T Osco Linea | Build year 1975 |
| Arthur Kristian Osmundsen | Born June 16, 1894 in Kristiansand |
| D/S Oteren | Build year 1888 |
| Bark Otra | Build year 1886 |
| Jernfullrigger Otra | Build year 1877 |