Gwanwoo (관우), alternatively spelled as Kwanwoo, may refer to:
- Artists
- Kim Kwan Woo (currently known as Kim Shin), soloist and former member of Two X and D.A.N
- People
- Yoo Gwan Woo, former member of IXFORM, Starlight Boys contestant and former Youth With You 3 contestant
- Jae Kwanwoo, former The Idol Band : Boy's Battle contestant