This is a List of members of the International Democrat Union, as of 2004.

• Justicialist Party (Argentina)
• The Liberal Party of Australia
• Austrian People's Party
• National Independence Party of Azerbaijan
• Nationalist Democratic Action (Associate Member) (Bolivia)
• Conservative Party of Canada
• Independent Democratic Union (Chile)
• National Renewal (Chile)
• Colombian Conservative Party
• Democratic Rally (Cyprus)
• Civic Democratic Party (Czech Republic)
• Conservative People`s Party (Denmark)
• Social Christian Reformist Party (Dominican Republic)
• Nationalist Republican Alliance (El Salvador)
• Pro Patria Union (Estonia)
• National Coalition Party (Finland)
• Union pour un Mouvement Populaire (France)
• Christian Democratic Union (Germany)
• Christian Social Union (Germany)
• New Patriotic Party (Associate Member) (Ghana)
• New Democracy (Greece)
• New National Party (Associate Member) (Grenada)
• National Advancement Party (Guatemala)
• National Party of Honduras
• Fidesz (Hungary)
• Democratic Party of Kenya (Associate Member)
• The Grand National Party (Korea) (S)
• Nationalist Party (Associate Member) (Malta)
• Democratic Party (Associate Member) (Mongolia)
• Mozambique National Resistance (Associate Member)
• Democratic Turnhalle Alliance of Namibia (Associate Member)
• New Zealand National Party
• Conservative Party (Norway)
• Social Democratic Party (Portugal)
• Kuomintang (KMT) (Taiwan)
• Union of Right Forces (Russia)
• People's Action Movement (PAM) (Associate Member) (St Kitts)
• New Democratic Party (Associate Member) (St Vincent and the Grenadines)
• Slovenian Democratic Party
• New National Party (Associate Member) (South Africa)
• Popular Party (Spain)
• United National Party (Sri Lanka)
• Moderate Party (Sweden)
• Conservative & Unionist Party (UK)
• Republican Party (United States)