The United Socialist Party (Sinhala: එක්සත් සමාජවාදි පකෂය Eksath Samajavadi Pakshaya Tamil: ஐக்கிய சோசலிச கட்சி Aikkiy Cōcalic Kaṭci) is a Trotskyist political party in Sri Lanka. It is affiliated to the Committee for a Workers’ International. It is led by Siritunga Jayasuriya and publishes the newspaper Sentharakai (Red Star).