Julia Hassler is an Olympic and national-record holding swimmer from Liechtenstein. She swam for and was Liechtenstein closing-ceremony flagbearer at the 2012 Olympics. She has also swam for Liechtenstein at several other international competitions including the: World Championships (2011), Games of the Small States of Europe, European Championships (2014), Short Course Worlds and Youth Olympics (2010).

During the Parade of Nations within the Rio de Janeiro 2016 Summer Olympics opening ceremony, athletes and officials from each participating team marched in the Maracanã Stadium preceded by their flag and placard bearer. Each flag bearer had been chosen either by the team's National Olympic Committee or by the athletes themselves.