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 government on a number of occasions. The party is generally considered as having a socialist or progressive economic agenda and is often associated with nationalist Sinhala parties. The Sri Lanka Freedom Party is a main constituent party in the United People's Freedom Alliance.