Jonathan Horne (born 17 January 1989) is a Germankarateka. At the 2018 World Karate Championships in Madrid, Spain, he won the gold medal in the men’s +84 kg event. He represented Germany at the 2020 Summer Olympics in Tokyo, Japan.
He won the gold medal in the men’s kumite +80 kg event at the 2009 World Games held in Kaohsiung, Taiwan.
In 2013, he represented Germany at the 2013 World Games held in Cali, Colombia and he won the gold medal in the men’s kumite +84 kg event. In 2017, he competed in the men’s kumite +84 kg event at the 2017 World Games held in Wrocław, Poland. He was eliminated in the elimination round.
In 2015, he won the silver medal in the men’s +84 kg event at the 2015 European Games held in Baku, Azerbaijan. At the 2019 European Games held in Minsk, Belarus, he won one of the bronze medals in the men’s +84 kg event.
In 2019, he won the gold medal in his event at the 2019 European Karate Championships held in Guadalajara, Spain.