- Yale University Library（YUL）
- Yale University Press
- Y-alloy
- Yalong Jiang
- Yalong River Scenic and Historic Area
- Yalong Wan
- Yalong Zhaxixueba Tibet Opera Troupe
- Yalta Agreement
- Yalta Conference
- Yalta system
- Yalu Jiang
- Yalujiang estuary
- Yalujiangkou Shidi
- Ya-lung River
- Yalu River
- yam
- Yamabe Hidehiko
- Yamabe invariant
- Yamabe problem
- Yamada Bimyō
- Yamada Yoji
- Yamaga Sokō
- Yamagata Bantō
- Yamagata International Documentary Film Festival
- Yamagata-ken