| • | Ukraine : @ |
| • | UNESCO : @ |
| • | Union de l'Europe occidentale (UEO) : @ @ @ |
| • | Union européenne : @ (75 à 150) @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ |
| • | Union pour la démocratie française (UDF) : @ |
| • | Universités. France : @ @ |
| • | Urba, Affaire : @ |
| • | Urbanisme. Allemagne : @ @ ; Etats-Unis : @ ; France : @ @ @ @ @ @ @ @ @ @ @ ; Pologne : @ |
| • | Uruguay : @ |
| • | Usagers. France : @ |