David Kenneth Fieldhouse, FBA (7 June 1925 – 28 October 2018) was an English historian of the British Empire.
Between 1981 and 1992, Fieldhouse held the Vere Harmsworth Professorship of Imperial and Naval History at the University of Cambridge.
Fieldhouse was a critic of the theories of imperialism put forward in the early 20th century by John A. Hobson and Lenin.
Fieldhouse said that the "obvious driving force of British expansion since 1870" came from explorers, missionaries, engineers, and empire-minded politicians.
Upon his retirement from Cambridge in 1992 his former students and colleagues published a festschrift entitled, Managing the Business of Empire: Essays in Honour of David Fieldhouse.