David Peter Dellar (30 October 1915 – 30 January 1994) was an Australian politician who served as a Labor Party member of the Legislative Council of Western Australia from 1963 to 1965, representing North-East Province.
After finishing his education, Dellar worked for periods on the mines at Linden, Menzies, Kanowna, and Kalgoorlie.
He enlisted in the Australian Army in 1942, initially with an anti-aircraft unit and later as a troop instructor.
A long-time member of the Labor Party, he was elected to parliament at a Legislative Council by-election in June 1963, caused by the death of William Hall.
He attempted to transfer to the new Lower North Province but was defeated by George Brand of the Liberal Party.