The Democratic United National Front (DUNF; Sinhala: ප්‍රජාතන්ත්‍රවාදී එක්සත් ජාතික පෙරමුණ, romanized: Prajathanthrvadi Eksath Jathika Peramuna, Tamil: ஜனநாயக ஐக்கிய தேசிய முன்னணி) is a political party in Sri Lanka.

It was founded in the early 1990s by a group of United National Party dissidents who were critical of then-incumbent president Ranasinghe Premadasa.

The party was led by Lalith Athulathmudali, Gamini Dissanayake who shared a joint presidency and G. M. Premachandra.

At the 2004 Sri Lankan parliamentary elections, the party was part of the SLFP-led United People's Freedom Alliance, which won 45.6% of the popular vote and 105 out of 225 seats.

However, in February 2010 they left the UNF to join the Democratic National Alliance led by Sarath Fonseka.