| William Wynne | |
| Nationality: | American |
| Sport: | Running |
| Collegeteam: | Florida Gators |
| Birth Date: | 30 January 1990 |
| Birth Place: | Marietta, Georgia |
| Residence: | Gainesville, Florida |
| Pb: | 110m hurdles: 13.64 (Gainesville 2009) 400m hurdles: 49.01 (Ostrava 2007) |
William Wynne (born January 30, 1990) is an American hurdler who specializes in the 400 metre hurdles. He currently holds the world youth best in the 400 m hurdles (84 cm) with a time of 49.01 seconds,[1] 0.85 seconds under the previous record set by South Africa's Marnus Kritzinger in 1999. He won two gold medals and a silver medal at the 2007 World Youth Championships in Athletics, which also earned him the 2007 USATF Youth Athlete of the Year award.[2] Wynne is a graduate of McEachern High School in Powder Springs, Georgia.