The 2018 South Korean Championships were held from June 9 through June 10 in Jincheon, South Korea.
All-Around Final Results
| Rank | Athlete | Club | VT | UB | BB | FX | AA |
| 1 | Yeo Seojeong | Gyeonggi High School | 14.500 | 12.250 | 11.550 | 12.750 | 51.050 |
| 2 | Ham Miju | Gyeonggi High School | 13.350 | 12.050 | 12.400 | 11.700 | 49.500 |
| 3 | Yun Narae | Jecheon City | 13.500 | 12.750 | 10.650 | 12.500 | 49.400 |
| 4 | Kim Jury | Gwangju High School | 12.850 | 11.600 | 12.250 | 12.150 | 48.850 |
| 5 | Yang Semi | Nantian High School | 13.000 | 11.200 | 8.900 | 10.700 | 43.800 |
| 6 | Seong Gaeun | Daegu Athletic | 11.400 | 9.600 | 11.800 | 10.000 | 42.800 |
| 7 | Kang Yumi | Daegu Athletic | 11.500 | 8.950 | 10.750 | 10.950 | 42.150 |
| 8 | Lee Eunju | Gangwon-do Athletic | —— | 10.550 | —— | —— | —— |
| 9 | Kang Yujin | Daegu Athletic | —— | 8.900 | —— | —— | —— |
All-Around Qualification Results
| Rank | Athlete | Club | VT | UB | BB | FX | AA |
| 1 | Yeo Seojeong | Gyeonggi High School | 13.350 | 12.250 | 13.350 | 13.250 | 52.200 |
| 2 | Yun Narae | Jecheon City | 13.350 | 12.650 | 13.100 | 12.750 | 51.850 |
| 3 | Kim Jury | Gwangju High School | 12.950 | 10.950 | 12.900 | 12.300 | 49.100 |
| 4 | Ham Miju | Gyeonggi High School | 12.250 | 11.950 | 12.650 | 12.000 | 48.850 |
| 5 | Yang Semi | Nantian High school | 12.950 | 11.450 | 11.500 | 11.650 | 47.550 |
| 6 | Kang Yujin | Daegu Athletic | 12.700 | 10.550 | 11.450 | 11.100 | 45.800 |
| 7 | Kang Yumi | Daegu Athletic | 11.150 | 10.000 | 11.750 | 11.100 | 44.000 |
| 8 | Seong Gaeun | Daegu Athletic | 11.300 | 7.500 | 11.500 | 9.900 | 40.200 |
| 9 | Lee Eunju | Gangwon-do Athetlic | 11.400 | 12.450 | 9.600 | —— | 33.450 |
The Gymternet 