Blanka Vlašić (born 8 November 1983) is a Croatian athlete who specialises in the high jump. She is the Croatian record holder in the event, and the former indoor World Champion. The daughter of Croatian decathlon record holder Joško Vlašić, she was a talented junior athlete and attended her first Olympic Games in 2000 Sydney at the age of sixteen. She won the World Junior Championships in Athletics in both 2000 and 2002. Vlašić broke her national record in 2004 and also won her first world senior medal at the World Indoor Championships that year. A hyperthyroid condition hindered her second Olympic appearance in Athens and she spent the 2005 season recuperating from surgery.