Hettikankanange Nalin Jayalath Perera (born 29 April 1954) is a Sri Lanka judge who served as the 46th Chief Justice of Sri Lanka.

Educated at St. Thomas' College, Kotte and S. Thomas' College, Gurutalawa, he studied law at the Sri Lanka Law College, passing out in 1977. His contemporaries included Mahinda Rajapaksa and Jeyaraj Fernandopulle. Having taken oaths as an attorney-at-law, he worked under Daya Perera.^[1]

Perera served as a Primary Court judge from 1980, in Embilipitiya and Welimada. In 1984, he was appointed as a Magistrate. He functioned as the Magistrate of Mount-Lavinia, Walasmulla, Kalutara and Colombo Fort. He became a District Judge in 1990.^[1]

In 2001 he was appointed a High Court Judge and served in Ratnapura, Kandy and Nuwara Eliya. He served as a Criminal High Court judge and became one of the first High Court Judges appointed to the newly formed Civil Appellate High Courts in Kandy. While High Court Judge of Ratnapura, he presided over the trial of the murder of Padmasiri Thrimavitharana.^[1]

In 2011, he was appointed a Justice of the Court of Appeal by President Mahinda Rajapaksa and Jeyaraj Fernandopulle served until 2016.^[2]

He was appointed by President Maithripala Sirisena as a Justice of the Supreme Court in March 2016 to replace Justice Sarath de Abrew on his retirement.^[3] In October 2018, he was nominated by President Maithripala Sirisena to the Constitutional Council for post of Chief Justice on the retirement of Justice Priyasath Dep. Following the approval of the Constitutional Council, he took oaths as the 46th Chief Justice of Sri Lanka on 12 October.^[4] After serving six months in office Perera retired upon reaching the age of 65. A ceremonial farewell was held by the Supreme Court on 5 April. Perera's successor, Attorney General Jayantha Jayasuriya was approved by the Constitutional Council on the 26 April.^[5][6]

He is married to Shirani Perera, who is a lawyer. His sister was Justice Sherin Madawala, former Court of Appeal Judge. He and his sister were the first brother and sister to serve in the Court of Appeal.^[7]