Basnayaka Ralalage Ranjith Siyambalapitiya (born 1 May 1961) (known as Ranjith Siyambalapitiya) is a Sri Lankan politician. He is currently serving as Minister of State for Finance, serving with Shehan Semasinghe since 8 September 2022.^[1] He was the Deputy Speaker and Chairman of Committees of the Parliament of Sri Lanka. He is a member of parliament for the Kegalle District. He had served as the former Cabinet Minister of Telecommunication and Information Technology.

Born to Basnayaka Ralalage Cyril Siyambalapitiya of Kegalle and Rajakumara Atapattu Mudiyanselage Kusumawathi of Wendala, Ruwanwella, he had his education at Ruwanwella Primary School and then at Royal College Colombo. In 1981 he entered to the University of Sri Jayawardanapura and graduated with a Bachelor of Business Administration in 1985.