Fechner is a surname. Notable people with the surname include:
- Carl-A. Fechner (born 1952), German documentary filmmaker
- Christian Fechner (1944–2008), French film producer and screenwriter
- Gino Fechner (born 1997), German footballer
- Gustav Fechner (1801–1887), German experimental psychologist, physicist and philosopher
- Harry Fechner (born 1950), German football defender
- Johannes Fechner (born 1965), German politician
- Max Fechner (1892–1973), Minister of Justice of the GDR
- Robert Fechner (1876–1939), American union leader
- Sebastian Fechner (born 1983), Polish footballer