The following lists events that happened during 1989 in Sri Lanka.

• President: J. R. Jayewardene (until 2 January); Ranasinghe Premadasa (starting 2 January)
• Prime Minister: Ranasinghe Premadasa (until 2 January); Dingiri Banda Wijetunga (starting 2 January)
• Chief Justice: Parinda Ranasinghe

• Governor of Central Province: E. L. B. Hurulle
• Governor of North Central Province: Dingiri Bandara Welagedara (until May); E. L. Senanayake (starting May)
• Governor of North Eastern Province: Nalin Seneviratne (until 31 January); Montague Jayawickrama (starting 1 February)
• Governor of North Western Province: Dingiri Banda Wijetunga
• Governor of Sabaragamuwa: Noel Wimalasena
• Governor of Southern Province: Abdul Bakeer Markar
• Governor of Uva: P. C. Imbulana (starting May)
• Governor of Western Province: Suppiah Sharvananda

• Chief Minister of Central Province: W. M. P. B. Dissanayake
• Chief Minister of North Central Province: G. D. Mahindasoma
• Chief Minister of North Eastern Province: Varatharaja Perumal
• Chief Minister of North Western Province: Gamini Jayawickrama Perera
• Chief Minister of Sabaragamuwa: G. V. Punchinilame
• Chief Minister of Southern Province: M. S. Amarasiri
• Chief Minister of Uva: Percy Samaraweera
• Chief Minister of Western Province: Susil Moonesinghe

• Sri Lankan Civil War
  • Indian intervention in the Sri Lankan Civil War
• 1987–1989 JVP insurrection^[1]
• 15 February – 1989 Sri Lankan parliamentary election: Sri Lanka holds their 9th parliamentary elections, with the ruling United National Party winning with a total of 125 seats.

• "Result of Parliamentary General Election 1989" (PDF). Department of Elections, Sri Lanka. Archived from the original (PDF) on 2009-03-04. Retrieved 2015-07-23.