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Decades:	1990s 2000s 2010s 2020s
See also:	Other events of 2015 Timeline of Sri Lankan history

The following lists notable events that took place during the year 2015 in Sri Lanka.

Incumbents

• President: Mahinda Rajapaksa (until 9 January), Maithripala Sirisena (from 9 January)
• Prime Minister: D. M. Jayaratne (until 9 January), Ranil Wickremesinghe (from 9 January)

Governors

• Central Province – Tikiri Kobbekaduwa (until 19 January); Surangani Ellawala (from 27 January)
• Eastern Province – Mohan Wijewickrama (until January); Austin Fernando (from January)
• North Central Province – Karunarathna Divulgane (until 27 January); P. B. Dissanayake (from 27 January)
• Northern Province – G. A. Chandrasiri (until 27 January); H. M. G. S. Palihakkara (from 27 January)
• North Western Province – Tissa Balalla (until 23 January); Amara Piyaseeli Ratnayake (from 23 January)
• Sabaragamuwa Province – W. J. M. Lokubandara (until 27 January); Marshal Perera (from 27 January)
• Southern Province – Kumari Balasuriya (until 23 January); Hemakumara Nanayakkara (from 23 January)
• Uva Province – Nanda Mathew (until 27 January); M. P. Jayasinghe (from 27 January)
• Western Province – Alavi Moulana (until 23 January); K. C. Logeswaran (from 23 January)

Chief Ministers

• Central Province – Sarath Ekanayake
• Eastern Province – M. N. Abdul Majeed (until 6 February); Ahamed Nazeer Zainulabdeen (from 6 February)
• North Central Province – S. M. Ranjith (until 28 January); Peshala Jayarathne (from 28 January)
• Northern Province – C. V. Vigneswaran
• North Western Province – Dayasiri Jayasekara (until 8 September); Dharmasiri Dassanayake (from 8 September)
• Sabaragamuwa Province – Maheepala Herath
• Southern Province – Shan Wijayalal De Silva
• Uva Province:
  • until 14 January – Shasheendra Rajapaksa
  • 14 January–1 September – Harin Fernando
  • from 15 September – Chamara Sampath Dassanayake
• Western Province – Prasanna Ranatunga (until 4 May); Isura Devapriya (from 4 May)

Events

January

• 8 January – Voters in Sri Lanka go to the polls for a presidential election with a tight contest predicted between President Mahinda Rajapaksa and challenger Maithripala Sirisena.^[1]
• 9 January – Mahinda Rajapaksa concedes defeat to Maithripala Sirisena in the presidential election.^[2]
• 11 January – The new Sri Lankan government announces that it will investigate allegations of a coup attempt by Mahinda Rajapaksa, in a bid to retain power after being defeated at the polls.^[3]

March

• 18 March – Two Sri Lankan greats, Mahela Jayawardene and Kumar Sangakkara retired from One international cricket following the team's defeat against South Africa. Jayawardene ended 18 year old career as the fifth highest ODI run scorer of all time. Sangakkara ended 15 year career as second highest ODI scorer of all time.^[4]

May

• 13 May – Murder of S. Vithiya, a schoolgirl gang raped and murdered in Pungudutivu.

August

• 15 August – Sri Lankan cricketer Kumar Sangakkara retired from all international cricket with his last Test match against India.^[5]

Deaths

• 26 September – Ana Seneviratne, former Sri Lankan Inspector-General of Police (b. 1927)