The Communist Party of Sri Lanka (Sinhala: ශ්රී ලංකාවේ කොමියුනිස්ට් පක්ෂය, romanized: Sri Lankavay Komiyunist Pakshaya Tamil: இலங்கை கம்யூனிஸ்ட் கட்சி, romanized: Ilankai Komyunist Katche) is a communist party in Sri Lanka. In the 2004 legislative election, the party was part of the United People's Freedom Alliance that won 45.6% of the popular vote and 105 out of 225 seats.