Sir Don Baron Jayatilaka, KBE known as D.B. Jayatilaka was a Sri Lankan Sinhalese educationalist, statesmen and diplomat. He was Vice-President of the Legislative Council of Ceylon; the Minister for Home Affairs and Leader of the House of the State Council of Ceylon; and Representative of Government of Ceylon in New Delhi. Sir D. B. Jayatilaka is also considered as a flag bearer of Buddhist education in Sri Lanka.

The State Council of Ceylon was the unicameral legislature for Ceylon, established in 1931 by the Donoughmore Constitution. The State Council gave universal adult franchise to the people of the colony for the first time. It replaced the Legislative Council of Ceylon, the colony's original legislative body.