| Name | Build year | Nationality | Bilde | Loss during WW2 |
|---|---|---|---|---|
| M/S Kathleen | 1916 | Norway | ||
| Bark Kathleen | 1865 | Norway | ||
| Bark Kathrine | 1858 | Norway | ||
| Galeas Kathrine | Unknown | Norway | ||
| M/S Kathrin G | 1984 | Norway | ||
| M/S Kathrin G | 1966 | Norway | ||
| D/S Katie | 1902 | Norway | ||
| D/S Katie Moller | 1919 | Great Britain | ||
| D/S Katingo Hadjipatera | 1913 | Greece | ||
| M/S Katinka | 1966 | Norway | ||
| M/S Katja | 1949 | Norway | ||
| M/S Katland | 1958 | Norway | ||
| M/S Katland | 1910 | Norway | ||
| Brigg Katland | 1855 | Norway | ||
| D/S Katland | 1917 | Norway | ||
| T/S Katrina Luckenbach | 1918 | USA | ||
| M/S Kattegat | 1936 | Norway | Hijacked, 1942-5-20 | |
| Fullrigger Katy | 1890 | Norway | ||
| M/T Katy | 1931 | Norway | ||
| D/S Kaupanger | 1930 | Norway | ||
| M/T Kaupanger | 1960 | Norway | ||
| D/S Kaupanger | 1890 | Norway | ||
| M/S Kaura | 1916 | Norway | ||
| M/S Kaura | 1962 | Norway | ||
| M/S Kavholm | 1972 | Norway |