Gunasena de Soyza, CMG, OBE (20 December 1902 – 12 October 1961) was a Sri Lankan civil servant.

He served as the Permanent Secretary to the Ministry of External Affairs and Defence before appointment as Ceylon's High Commissioner to the United Kingdom.

He thereafter served as Assistant Government Agent in Badulla and Mullattivu before he returned to Colombo as Deputy Registrar of Co-operative Society.

In 1948, he was appointed Permanent Secretary to the Ministry of Food and Co-operative Undertakings and served till 1949.

He was appointed Ceylon's High Commissioner to the United Kingdom in December 1957 and served till October 1958.