Lanka Prajathanthravadi Pakshaya (Ceylon Democratic Party) was a political party

Political party

A political party is a political organization that typically seeks to influence government policy, usually by nominating their own candidates and trying to seat them in political office. Parties participate in electoral campaigns, educational outreach or protest actions...

 in Sri Lanka

Sri Lanka

Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is a country off the southern coast of the Indian subcontinent. Known until 1972 as Ceylon , Sri Lanka is an island surrounded by the Indian Ocean, the Gulf of Mannar and the Palk Strait, and lies in the vicinity of India and the...

. LPP was led by Dr. W. Dahanayake. In the 1960 elections LPP was part of the 'Mahajana Eksath Peramuna' coalition, consisting of the Sri Lanka Freedom Party

Sri Lanka Freedom Party

The Sri Lanka Freedom Party is one of the major political parties in Sri Lanka. It was founded by S.W.R.D Bandaranaike in 1951 and, since then, has been one of the two largest parties in the Sri Lankan political arena. It first came to power in 1956 and since then has been the predominant party in...

, Viplavakari Lanka Sama Samaja Party

Viplavakari Lanka Sama Samaja Party

Viplavakari Lanka Sama Samaja Party was a group that broke away from the Trotskyist Lanka Sama Samaja Party, since Philip Gunawardena refused to reconcile with the Bolshevik Samasamaja Party...

, Jathika Vimukthi Peramuna and LPP.

Ahead of the 1965 elections the link between LPP and SLFP had been broken. LPP won one seat. After the elections LPP gave their support to the United National Party

United National Party

The United National Party, often referred to as the UNP ), , is a political party in Sri Lanka. It currently is the main opposition party in Sri Lanka and is headed by Ranil Wickremesinghe...

 government. Soon thereafter it merged into the Sri Lanka Freedom Socialist Party

Sri Lanka Freedom Socialist Party

Sri Lanka Freedom Socialist Party was a political party in Sri Lanka. SLFSP was formed in 1964 by C.P. de Silva when he broke away from the Sri Lanka Freedom Party. In the 1965 elections, SLFSP contested in coalition with the United National Party. In total SLFSP had 32 candidates, who received a...

, which merged into UNP.