Julien Bonvin (born 10 January 1999) is a Swiss sprinter who specialises in the 400 metres hurdles.

He has been the national champion in the 400 metres hurdles ever since 2021, earning the title consecutively three times in a row.

Also, he made his international debut at the 2016 European U18 Championships in Tbilisi, Georgia and finished in fifth place during the semi-finals.

He kept up his winning streak for another year at the 2019 Swiss U23 Championships, where he finished in first place in the 400 metres hurdles.

He ran the first leg during the final heat, but as the race neared the end, the Dutch runner pushed his British competitor which caused him to trip the Swiss athlete as a result.