- Y ... Yahata
- Yahgan ... Yale Scientific Expedition
- Yale University ... Yamatohime No Mikoto
- Yamauchi family ... Yang Zengxin
- Yang Zhu ... Yaoshi fo
- Yaotl ... yashmak
- Yashodhara ... Yazdegerd II
- Yazdegerd III ... Yeesookyung
- YeEtiyopʾiya ... yellow Guinea yam
- yellow gum ... yellow-rumped kinglet
- yellow-rumped warbler ... Yenisey
- Yenisey language ... Yevpatoriya
- Yevreyskaya Avtonomnaya Oblast ... Yildirim, Cem
- Yıldız Mountains ... Yo, el supremo
- yo-yo ... Yonaguni Monument
- Yonath, Ada ... Yorkshire Post
- Yorkshire pudding ... You Must Set Forth at Dawn
- You Only Live Once ... Young modulus
- Young Mother, A ... Younger, James
- Younger, Jim ... Ystad
- Ysyk, Lake ... Yudi
- Yudi Shun ... Yulia Tymoshenko Bloc
- Yulin ... Yushitai
- Yushu Tibetan Autonomous Prefecture ... Yzerman, Steve