YU or Yu may refer to:
Yugoslavia (Serbo-Croatian: Jugoslavija/Југославија [juɡǒslaːʋija]; Slovene: Jugoslavija [juɡɔˈslàːʋija]; Macedonian: Југославија [juɡɔˈsɫavija]; Pannonian Rusyn: Югославия, transcr.
Yuri Alekseyevich Gagarin (Russian: Ю́рий Алексе́евич Гага́рин, IPA: [ˈjʉrʲɪj ɐlʲɪˈksʲejɪvʲɪtɕ ɡɐˈɡarʲɪn]; 9 March 1934 – 27 March 1968) was a Soviet pilot and cosmonaut.
Yunnan is a province of the People's Republic of China, located in the far southwest of the country. It spans approximately 394,000 square kilometres (152,000 sq mi) and has a population of 45.7 million (as of 2009).
Yulia Volodymyrivna Tymoshenko (Ukrainian: Ю́лія Володи́мирівна Тимоше́нко, pronounced [ˈjulʲijɐ voɫoˈdɪmɪrʲivnɐ tɪmoˈʃɛnko], née Hrihyan, Грігян, born 27 November 1960) is a Ukrainian politician.
Yukon (; French: [jykɔ̃]; also commonly called the Yukon) is the smallest and westernmost of Canada's three federal territories (the other two are the Northwest Territories and Nunavut).