| Daykey High School | |
| Native Name: | Korean: 대기고등학교 |
| Motto: | Korean: 자강 자율 자립 |
| Campus: | Rural |
| Fundingtype: | Private |
| Schooltype: | high school |
| Address: | 453-6 Beonyeong-ro, 1800 Bonggae-dong |
| City: | Jeju |
| Country: | South Korea |
| Principal: | Kim, Chang-Jin |
| Head Name: | Chairman of the board |
| Head: | Kim, Pyeong-Hae |
| Faculty: | 75 (2013) |
| Grades: | 10–12 |
| Students: | 1210 (2013) |
Daykey High School is a private high school located in Jeju, South Korea. It was established in 1983.