| United States Marine Corps | United States Marine Corps |
| United States Military Academy | West Point |
| United States national basketball team | Dream Team |
| United States Navy | United States Navy |
| United States Navy SEALs | Navy SEALs |
| United States occupation of Fallujah | Slaget om Fallujah |
| United States of America | Amerikas Forenede Stater |
| United States Secretary of Defense | Det amerikanske forsvarsdepartement |
| United States Secretary of State | Udenrigsminister |
| United States Senate | Senatet |
| United States Special Operations Command | USSOCOM |
| United States Virgin Islands | Amerikanske Jomfruøer |
| Units of measurement | Måleenhed |
| Unity of the Brethren | Herrnhutiske Brødremenighed |
| Universal abit | ABIT |
| Universal asynchronous receiver transmitter | UART |
| Universal Coordinated Time | UTC |
| Universal Declaration of Linguistic Rights | Menneskerettighedserklæringen |
| Universal Media Disc | Universal Media Disc |
| Universal Plug and Play | Universal Plug and Play |
| Universal Product Code | Universal Product Code |
| Universal quantification | Alkvantor |
| Universal reconciliation | Universalisme |
| Universal Serial Bus | Universal Serial Bus |
| Universal Studios | Universal Studios |
| Universal Studios Theme Parks | Universal Studios |
| Universal Transverse Mercator coordinate system | Universal Transverse Mercator |
| universe | univers |
| Universiteit van Amsterdam | Universiteit van Amsterdam |
| Universitet | Universitet |
| university | universitet |
| University for applied sciences | Seminarium |
| University hospital | Universitetshospital |
| University of Aalborg | Aalborg Universitet |
| University of Aarhus | Aarhus Universitet |
| University of Alicante | Sprogteknologi |
| University of Cambridge | Cambridge Universitet |
| University of Chicago | University of Chicago |
| University of Copenhagen | Københavns Universitet |
| University of Greenland | Ilisimatusarfik |
| University of Hawaii | University of Hawaii |
| University of Kiel | Christian-Albrechts-Universität |
| University of Münster | Westfälische Wilhelms-Universität |
| University of Oslo | Universitetet i Oslo |
| University of Oxford | Oxford Universitet |
| University of Paris | Sorbonne |
| University of Pennsylvania | University of Pennsylvania |
| University of Southern Denmark | Syddansk Universitet |
| University of St Andrews | University of St Andrews |
| University of Sussex | Sussex Universitet |
| University of Tasmania | University of Tasmania |
| University of the Faroe Islands | Færøernes Universitet |
| University of Vienna | Wien Universitet |
| University of Washington | University of Washington |
| Universytet | Universitet |
| Unix | UNIX |
| Unix shell | Unix-skal |
| Unix time | Tid |
| Unjárga | Nesseby |
| unknown | ukendt |
| Unladen weight | Tara |
| unleaded | blyfri |
| unless | undtagen |
| Unloading bay | Forår |
| Unmanned aerial vehicle | UAV og drone |
| Unmanned space mission | Rumsonde |
| unmarried | ugift |
| Unmitigate | Hel |
| unnatural | unaturlig |
| unnecessary | unødvendig |
| Unnur Birna Vilhjálmsdóttir | Unnur Birna Vilhjálmsdóttir |
| UNO | Uno |
