Hassel is a German, Danish, Norwegian and Swedish surname. Notable people with this surname include the following:
- Bryan Hassel, American popular writer on education
- Danny Hassel (born 1967), American actor
- Georg Hassel (1770âÂÂ1829), German geographer
- Henrik Hassel (1700âÂÂ1776), Finnish professor and humanist
- Kai-Uwe von Hassel (1913âÂÂ1997), German politician from Schleswig-Holstein associated with the CDU party
- Karl-Heinz von Hassel (1939âÂÂ2016), German actor
- Kaspar Hassel (1877âÂÂ1962), Norwegian sailor
- Odd Hassel (1897âÂÂ1981), Norwegian physical chemist and Nobel Laureate
- Sverre Hassel (1876âÂÂ1928), Norwegian polar explorer
- Tina Hassel (born 1964), German journalist