Dieffenbach (surname)

Dieffenbach is a German surname. Notable people with the surname include:

• Edouard Dieffenbach (1897–1972) French military officer, World War I veteran
• Ernst Dieffenbach (1811–1855), German physician, geologist and naturalist
• Georg Christian Dieffenbach (1822–1901), German poet and theologian
• Johann Friedrich Dieffenbach (1792–1847), German surgeon
• Joseph Dieffenbach (1796–1863), German gardener