Ludwig Lachmann (1906 - 1990) an Austrian economist who was an important contributor to the Austrian School.

Ludwig Lachmann was a student at the London School of Economics in the 1930s where he first became interested in the Austrian School. He later taught in Witwatersrand University in South Africa.

He grew to believe that the Austrian School had deviated from Carl Menger's original vision of an entirely subjective economics. To Lachmann, Austrian Theory was to be characterized as an evolutionary, or "genetic-causal", approach against the equilibrium and perfect knowledge found in mainstream Neoclassical economics.