The United Democratic Party is one of Belize's two major political parties and currently the main opposition political party in Belize. It currently holds eight of the 29 seats in the House of Representatives.

The United Democratic Party is a conservative political party in the Cayman Islands. In the elections, 8 November 2000, with a turnout of 80% only non-partisans were elected. After the election members of parliament formed the United Democratic Party, currently headed by Mc Keeva Bush.

The United Democratic Party is a conservative political party in The Gambia, affiliated to the International Democratic Union, founded in 1996 by the human rights lawyer Ousainou Darboe. As a candidate at the presidential elections of 18 october 2001, he came second with 32.6% of the popular vote. The last legislative elections, 17 january 2002, were boycotted by the party.

The United Democratic Party is a liberal party in Tanzania.

The United Democratic Party was a minor political party in the United Kingdom. It was founded in mid-1974 by a group of far right figures who had formerly identified as Independent Conservatives.