Justice Felix Reginald Dias Bandaranaike II (Sinhala: ෆෙලික්ස් රෙජිනල්ඩ් ඩයස් බණඩාරනායක) (17 January 1891 – 26 October 1951) was a Ceylonese (Sri Lankan) judge and lawyer. He was a Puisne Justice of the Supreme Court of Ceylon. Born to Felix Reginald Dias Bandaranaike I, he was educated at the Royal College Colombo and graduated from the University of Cambridge.