| Position: | Defenceman |
| Shoots: | Left |
| Height Ft: | 5 |
| Height In: | 10 |
| Weight Lb: | 198 |
| Team: | HL Anyang |
| League: | ALH |
| Ntl Team: | South Korea |
| Birth Date: | 7 February 1988 |
| Birth Place: | Seoul, South Korea |
| Career Start: | 2009 |
Lee Don-ku (Korean: 이돈구 born February 7, 1988) is a South Korean professional ice hockey defenceman. He is playing for HL Anyang of Asia League Ice Hockey.[1] He previously played 4 years for Yonsei University.
He has been a member of the South Korean national ice hockey team since 2009.[2] He played in the 2018 Winter Olympics.