Dayuan is the Chinese exonym for a country that existed in Ferghana valley in Central Asia.
Dayuan may also refer to: Dayuan District, Taoyuan, Taiwan Ang Da Yuan (洪达远 Hóng Dáyuǎn), one of the seven perpetrators of the 2019 Orchard Towers murder
See also Dayuan station (disambiguation) Davan (disambiguation) Dawan (disambiguation)