| Full Name | Choi Si Won |
| Stage Name | Siwon |
| Native Name | 최시원 |
| Birthday | April 7, 1986 |
| Age | 39 years and 2 months old |
| Zodiac Sign | Aries |
| Birthplace | Seoul, Gangdong-gu, Jamsil-dong, South Korea |
| Height | 6′ (183 cm) |
| Weight | 138.9 lbs (63 kg) |
| Blood Type | B |
| MBTI | ENTJ |
| Education | Inha University |
| Languages | Korean, English, Mandarin |
| Group | SUPER JUNIOR |
| Social Media | Instagram: [@siwonchoi] TikTok: [@davidsiwonchoi] |