The United Democratic Party (UDP) was a political party in Malaysia.
The party was established by Lim Chong Eu and several other former members of the Malayan Chinese Association on 21 April 1962. Largely supported by middle-class Chinese voters, the party won a single seat in the 1964 general elections, with Lim elected in Tanjong.
The party was dissolved on 23 June 1968 after Lim had helped to establish the Parti Gerakan Rakyat Malaysia.