Hasse Thomsén (born 1965) is a former Swedish amateur boxer. He is best known for his participation in the super heavyweight division at the 1992 Summer Olympics in Barcelona and for his silver medal at the 1991 European Amateur Boxing Championships.
Career Thomsén represented Sweden in various international boxing competitions during the late 1980s and early 1990s.
- 1991 European Championships: Thomsén achieved significant success at the 1991 European Amateur Boxing Championships held in Gothenburg, Sweden. Competing in the super heavyweight category, he earned a silver medal, an impressive achievement on home soil.
- 1992 Summer Olympics: He qualified for the 1992 Summer Olympics in Barcelona, Spain. In the super heavyweight (+91 kg) division, Thomsén's Olympic journey ended in the first round when he lost to Denmark's Brian Nielsen by decision.
Following his amateur career, Hasse Thomsén did not pursue a prominent professional boxing career.