Basnayaka Yasarathnalage Gunapala Rathnasekara (born 7 December 1961) is a Sri Lankan academic, politician and Member of Parliament.
Rathnasekara was born on 7 December 1961. He has a BSc degree from the University of Sri Jayewardenepura and a MCom degree from the Sri Krishnadevaraya University. He is a senior lecturer in the University of Sri Jayewardenepura's Department of Accounting. He is director of the Kurunegala Sipwin Private Tuition Institute. He is a member of Viyathmaga (Path of the Learned), a pro-Rajapaksa, nationalist group of academics, businesspeople and professionals.
Rathnasekara contested the 2020 parliamentary election as a Sri Lanka People's Freedom Alliance electoral alliance candidate in Kurunegala District and was elected to the Parliament of Sri Lanka.