General R. M. Daya Ratnayake, WWV, RWP and three Bars, RSP, USP is a retired Sri Lanka Army officer who served as the Commander of the Sri Lanka Army from 2013 to 2015.

Following his retirement from the army, he served as the Chairman, Sri Lanka Ports Authority and Secretary to the Ministry of Industries.

He served as the General Officer Commanding of 23 Infantry Division in the Eastern province.

[1] On 1 August 2013, he became the 20th commander of the Sri Lanka Army and promoted to the rank of Lieutenant General simultaneously.

[3] The outgoing commander was promoted to the rank of full general by President Maithripala Sirisena.