Niluka Karunaratne (Sinhala: නිලූක කරුණාරත්න; Tamil: நிலுக கருணாரத்ன) (born 13 February 1985) is a Sri Lankan badminton player who has competed at the Olympics in 2012, 2016 and 2020.

[13] He was also part of the Sri Lankan mixed badminton team, which was knocked out at the quarterfinal stage by England.

[15] He also set a record for winning most consecutive number of men's singles title at the Sri Lankan Badminton Nationals during 9 occasions from 2000 to 2009.

[24] In January 2021, he tested positive for COVID-19 along with his younger brother Chamika and Niluka was disbanded from the National Badminton Association.

[26][27] He announced his retirement from competing in local events after claiming the national badminton title for the record seventeenth time in 2021.

[29] In May 2021, Niluka reached the semifinals of the 56th edition of the Portuguese International Badminton Championships but was eliminated from the semis after losing to Germany's Max Weisskirchen.

[38] In 2014, Sri Lanka Badminton Association took disciplinary action against Niluka for acting in an undisciplined manner during the selection trials prior to the 2014 Commonwealth Games.