Kenneth Macfarlane Walker (6 June 1882 – 22 January 1966) was a British author, philosopher and urological surgeon.

He was the author of Meaning and Purpose (1944), an analysis of the main scientific theories of the last hundred years and their impact upon religious thought and belief.

It aimed at questioning the completeness of Charles Darwin's theory of natural selection and evolution, as well as evaluating the most relevant scientific discoveries at the time of publication and their effect on the general population.

He also attacked mechanistic accounts of the universe and natural selection in his book Life's Long Journey (1961).

In his book The Extra-Sensory Mind he supported the controversial claims of radionics.