Blanka Vlašić (Croatian pronunciation: [ˈblaːŋka ˈʋlaʃitɕ]; born 8 November 1983) is a Croatian track and field athlete who specialises in the high jump. She is a two-time world champion and double Olympic medallist who ranks as the joint second highest female jumper of all time with her personal best of 2.08 m (6 ft 9 3⁄4 in). 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 the Croatia 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.
She returned in 2006, taking the silver at the World Indoor Championships. The 2007 season signalled a strong run of form: she won at the 2007 World Championships, became the indoor world champion in 2008 and her winning streak came to an end with a narrow loss at the Beijing Olympics, where she took silver. She became World Champion for a second time in 2009. Her awards also including the IAAF World Athlete of the Year 2010 and the European Athlete of the Year Trophy (2007, 2010).