- Uganda
- Ukraine (Famine)
- UN General Assembly Resolution on Genocide
- Union of Soviet Socialist Republics
- United Nations
- United Nations Commission on Human Rights
- United Nations General Assembly
- United Nations Security Council
- United Nations Sub-Commission on Human Rights
- United Nations War Crimes Commission
- United States Foreign Policies Toward Genocide and Crimes Against Humanity
- Universal Declaration of Human Rights
- Universal Jurisdiction
- Utilitarian Genocide
- Utopian Ideologies as Motives for Genocide
