Kui can refer to:
- Kui (instrumental musical composition), comes from Kazakh language
- Kui (Chinese mythology) 夔, a one-legged mountain demon, also legendary inventor of music and dance
- Kui (dragonball), a manga character
- Kui, Hiroshima, a Japanese town
- Kui kuningas nutab, a 1997 song by Terminaator
- Kui language (India), a Dravidian language spoken by the Khonds
- Kui people, a Mon-Khmer ethnic minority
- Kui Lee, a singer-songwriter
- Kui (Māori mythology), a chthonic Māori demigod, also father of Vahi-vero in Tuamotu mythology
- Kui the Horseclaw, a character in Nausicaä of the Valley of the Wind
- Kui Yuanyuan, a Chinese gymnast
- KUI, acronym for Kinetic User Interfaces, also for Kawau Island airport
- KUI 91AB, a variable star of Delta Cephei type
- KUI 93AB, an eclipsing binary of Algol variable type
- KUI Clan, Clan of Clans CoD type