| | OUED BEHT | 1919 | 1928 |
| | OUED EL ABID | 1921 | 1924 |
| | OUED NOUMER | 1981 | 1987 |
| | OUED YQUEM | 1920 | 1922 |
| | OUERCUS | 1926 | 1926 |
| | OUERGHA | 1920 | 1927 |
| | OURANOS | 1952 | 1973 |
| | OUWERKERK | 1954 | 1954 |
| | OVAMBO | 1939 | 1949 |
| | OVAMBO COAST | 1939 | 1953 |
| | OVEDJE | 1937 | 1967 |
| | OVEDJE I | 1937 | 1968 |
| | OVERIJSEL | 1946 | 1946 |
| | OVERIJSSEL | 1878 | 1878 |
| | OVERLOON | 1918 | 1946 |
| | OVERVEEN | 1917 | 1918 |
| | OVERVEEN | 1919 | 1919 |
| | OVERWAARD | 1918 | 1920 |
| | OVERWAARD | 1919 | 1920 |
| | OVERYSEL | 1961 | 1961 |
| | OVULA | 1938 | 1938 |
| | OZGE | 1960 | 2004 |