Harder (surname)
Harder is a surname. Notable people with the surname include:
- Agnes Harder, :de:Agnes Harder, German teacher and writer
- Bobbie Harder, American 21st century politician
- Christopher Harder, Canadian lawyer in New Zealand
- Conrad Harder, Danish footballer
- Fred Harder, American racing driver
- Elaine Harder, American politician
- , German SS-Hauptscharführer in Auschwitz concentration camp
- George Harder, Samoan former rugby union footballer
- Grace Harder, American trampoliner
- Günter Harder, German mathematician
- Hans Harder, Danish painter and drawing master
- Hauke Harder, German composer and experimental physicist
- Heinrich Harder, German artist and art professor
- Hieronymus Harder, German botanist and teacher of Latin
- James Harder (ufologist), American professor of civil and hydraulic engineering, and ufologist
- Jan Harder, Canadian politician
- Joe Harder, American politician
- Josh Harder, American politician
- Kelsie B. Harder, American professor and linguist
- Knud Harder, Danish composer, organist and conductor
- Lutz-Michael Harder, German opera tenor and voice teacher
- Mel Harder, American Major League Baseball pitcher, coach and manager
- Olli Harder, New Zealand association football coach and former player
- Otto Harder, German footballer and convicted war criminal
- Pat Harder, American football player and official
- Pernille Harder, Danish footballer
- Pernille Harder (badminton), Danish former badminton player
- Peter Harder (academic), Danish linguist and professor of English
- Peter Harder (politician), Canadian senator and former civil servant
- Rachael Thomas, née Harder, Canadian politician
- Rhea Harder, German actress
- Robert Harder, American politician
- Spud Harder, American college football player, college football and baseball coach and college athletic director
- Tammo Harder, German footballer
- Theo Härder, German computer scientist and professor
- Vince Harder, New Zealand R&B/pop singer and producer