David William Fulker (8 March 1937 – 9 July 1998) was a British behavioural geneticist at the University of Colorado's Institute for Behavioral Genetics.

[1] In 1970, Fulker and John L. Jinks published a proposal that the biometric genetic approach should be applied to human behaviour.

[citation needed] At the Institute of Psychiatry, Fulker's research established that many behaviours, not only in rodents but also in humans and in such "higher" mental traits as personality and also psychiatric diseases show genetic influences.

Fulker subsequently obtained a BSc in psychology at Birkbeck College, London University, graduating with first class honours, and deciding to work in genetics.

Fulker joined the staff at Birmingham as a lecturer where he remained until moving in 1975 to a senior lectureship at the Institute of Psychiatry in London, where he also directed its animal laboratories at the Bethlem Royal Hospital.