Seo Yoon-hee
Seo Yoon-hee is a badminton player from South Korea. She graduated from the SacredHeart Girl's High School, and later joined the Samsung Electro-Mechanics team.
Seo played badminton at the 2004 Summer Olympics for Korea, defeating Pi Hongyan of France in the first round but losing to Petya Nedelcheva of Bulgaria in the round of 16.
Achievements
World Junior Championships
Girls' singles| Year | Venue | Opponent | Score | Result |
| 2002 | Pretoria Showgrounds, Pretoria, South Africa |  Jiang Yanjiao | 0–11, 11–8, 3–11 | Silver |
Asian Junior Championships
Girls' singles| Year | Venue | Opponent | Score | Result |
| 2001 | Taipei Gymnasium, Taipei, Taiwan |  Jun Jae-youn | 8–11, 11–8, 6–11 | Silver |
BWF Grand Prix
The BWF Grand Prix has two levels: Grand Prix and Grand Prix Gold. It is a series of badminton tournaments, sanctioned by Badminton World Federation since 2007. The World Badminton Grand Prix has been sanctioned by the International Badminton Federation since 1983.Women's singles
| Year | Tournament | Opponent | Score | Result |
| 2010 | Australian Open |  Minatsu Mitani | 22–20, 14–21, 21–19 | Winner |
| 2005 | Chinese Taipei Open |  Tracey Hallam | 9–11, 7–11 | Runner-up |
Women's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2010 | Australian Open | Kang Hae-won | Kim Min-seo Lee Kyung-won | 17–21, 17–21 | Runner-up |