The United National Party (UNP) (Sinhala: එක්සත් ජාතික පක්ෂය, romanized: Eksath Jāthika Pakshaya, Tamil: ஐக்கிய தேசியக் கட்சி, romanized: Aikkiya Tēciyak Kaṭci) is one of the oldest political parties in Sri Lanka.

It has been the main ruling party in Sri Lanka on several occasions.

The leader is appointed by the majority vote of the working committee of the party who meets at Sirikotha, when the position is vacant.

Former President Ranil Wickremesinghe has been the leader of the UNP since 1994.

Ruwan Wijewardene is the current deputy leader of the UNP.