United Kingdom

• the 1707 Act of Union between Scotland
  Scotland
  Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...
  
   and England
  England
  England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...
  
   or,
• the 1800 Act of Union
  Act of Union 1800
  The Acts of Union 1800 describe two complementary Acts, namely:* the Union with Ireland Act 1800 , an Act of the Parliament of Great Britain, and...
  
   between Ireland
  Ireland
  Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...
  
   (and more recently Northern Ireland
  Northern Ireland
  Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...
  
  ) and Great Britain
  Great Britain
  Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...
  
  .

• Democratic Unionist Party
  Democratic Unionist Party
  The Democratic Unionist Party is the larger of the two main unionist political parties in Northern Ireland. Founded by Ian Paisley and currently led by Peter Robinson, it is currently the largest party in the Northern Ireland Assembly and the fourth-largest party in the House of Commons of the...
  
   (DUP) - The larger of the two main unionist political parties in Northern Ireland; founded by Ian Paisley
  Ian Paisley
  Ian Richard Kyle Paisley, Baron Bannside, PC is a politician and church minister in Northern Ireland. As the leader of the Democratic Unionist Party , he and Sinn Féin's Martin McGuinness were elected First Minister and deputy First Minister respectively on 8 May 2007.In addition to co-founding...
  
   and currently led by Peter Robinson
  Peter Robinson (politician)
  Peter David Robinson is the current First Minister of Northern Ireland and leader of the Democratic Unionist Party...
  
  . The largest party in the Northern Ireland Assembly
  Northern Ireland Assembly
  The Northern Ireland Assembly is the devolved legislature of Northern Ireland. It has power to legislate in a wide range of areas that are not explicitly reserved to the Parliament of the United Kingdom, and to appoint the Northern Ireland Executive...
  
   and the fourth-largest party in the House of Commons of the United Kingdom
  • Protestant Unionist Party
    Protestant Unionist Party
    The Protestant Unionist Party was a unionist political party operating in Northern Ireland from 1966 to 1971. It was set up by Ian Paisley, and was the forerunner of the modern Democratic Unionist Party and emerged from the Ulster Protestant Action movement.The UPA had two councillors elected,...
    
     - formed by Ian Paisley
    Ian Paisley
    Ian Richard Kyle Paisley, Baron Bannside, PC is a politician and church minister in Northern Ireland. As the leader of the Democratic Unionist Party , he and Sinn Féin's Martin McGuinness were elected First Minister and deputy First Minister respectively on 8 May 2007.In addition to co-founding...
    
     in 1966 out of the Ulster Protestant Action
    Ulster Protestant Action
    Ulster Protestant Action was an loyalist and Protestant fundamentalist vigilante group in Northern Ireland.The group was founded at a special meeting at the Ulster Unionist Party's offices in Glengall Street, Belfast, in 1956. Among the attendees were many loyalists who were to become major...
    
     (UPA) movement. It was the forerunner of the Democratic Unionist Party and disbanded in 1971 with the DUP's formation
• Ulster Unionist Party
  Ulster Unionist Party
  The Ulster Unionist Party – sometimes referred to as the Official Unionist Party or, in a historic sense, simply the Unionist Party – is the more moderate of the two main unionist political parties in Northern Ireland...
  
   (UUP) - The smaller and more moderate of the two main unionist political parties in Northern Ireland. It governed Northern Ireland between 1921 and 1972 as the sole Unionist party.
  • Ulster Conservatives and Unionists – New Force
    Ulster Conservatives and Unionists – New Force
    The Ulster Conservatives and Unionists, officially registered as the Ulster Conservatives and Unionists – New Force , is a bipartisan electoral alliance in Northern Ireland between the Ulster Unionist Party and the Northern Ireland branch of the Conservative Party, the latter party also being...
    
     (Conservatives and Unionists) - electoral alliance
    Electoral alliance
    An electoral alliance may take the form of a bipartisan electoral agreement, electoral agreement, electoral coalition or electoral bloc. It is an association of political parties or individuals which exists solely to stand in elections...
    
     between the UUP and the Conservatives in Northern Ireland
    Conservatives in Northern Ireland
    The Conservatives Northern Ireland is the section of the Conservative and Unionist Party of the United Kingdom that operates in Northern Ireland...
    
    , the Northern Ireland arm of the Conservative Party
• Progressive Unionist Party
  Progressive Unionist Party
  The Progressive Unionist Party is a small unionist political party in Northern Ireland. It was formed from the Independent Unionist Group operating in the Shankill area of Belfast, becoming the PUP in 1979...
  
   (PUP), minor loyalist party formed in 1979
• Ulster Unionist Labour Association
  Ulster Unionist Labour Association
  The Ulster Unionist Labour Association was an association of trade unionists founded by Edward Carson in June 1918, aligned with the Ulster Unionists in Northern Ireland. Members were known as Labour Unionists. 1918 and 1919 were the years of intense class conflict throughout Britain. This period...
  
   (or Labour Unionist Party)

• Independent Unionist Association
  Independent Unionist Association
  The Independent Unionist Association or Independent Unionist Party was a political party in Northern Ireland.The organisation was founded in 1937, shortly before the announcement of the Northern Ireland general election, 1938. It consisted of a disparate group of independent Unionists, and...
  
   (or Independent Unionist Party) - existed from 1937 to late 1940s. Consisted of a disparate group of independent Unionist
  Independent Unionist
  See also Independent .Independent Unionist has been a label sometimes used by candidates in elections in the United Kingdom, indicating a support for Unionism, retaining the unity of the British state....
  
  s, and included Tommy Henderson
  Tommy Henderson
  Thomas Gibson Henderson was an Ulster independent Unionist politician. He served in the House of Commons of Northern Ireland from 1925 to 1953 in vigorous opposition to the Unionist governments on all issues other than the partition of Ireland, and is famous for having at one stage spoken for...
  
  , member of the House of Commons of Northern Ireland
  House of Commons of Northern Ireland
  The House of Commons of Northern Ireland was the lower house of the Parliament of Northern Ireland created under the Government of Ireland Act 1920. The upper house in the bicameral parliament was called the Senate. It was abolished with the passing of the Northern Ireland Constitution Act...
  
  
• Vanguard Unionist Progressive Party (Ulster Vanguard), existed from 1973 and 1978; far-right party
• Unionist Party of Northern Ireland
  Unionist Party of Northern Ireland
  The Unionist Party of Northern Ireland was a political party founded by Brian Faulkner in September 1974.-Formation:The party emerged following splits in the Ulster Unionist Party in 1973 and 1974 over the British government's white paper Northern Ireland Constitutional Proposals, the Northern...
  
  , existed from 1974 and 1981
• United Ulster Unionist Party
  United Ulster Unionist Party
  The United Ulster Unionist Party was a unionist political party which existed in Northern Ireland between 1975 and 1984.It emerged from a division in the Vanguard Progressive Unionist Party in the late 1970s...
  
  , existed from 1975 and 1982, splinted from the Vanguard Progressive Unionist Party due to a disagreement over power-sharing
• Ulster Popular Unionist Party
  Ulster Popular Unionist Party
  The Ulster Popular Unionist Party was a unionist political party in Northern Ireland. It was founded in 1980 by James Kilfedder, independent Unionist Member of Parliament for North Down, who led the party until his death in 1995....
  
  , existed from 1980 to 1995; led by James Kilfedder
  James Kilfedder
  Sir James Alexander Kilfedder was a Northern Ireland unionist politician.-Early life:...
  
  
• UK Unionist Party
  UK Unionist Party
  The UK Unionist Party was a small unionist political party operating in Northern Ireland from 1995 to 2008. It was nominally formed by Robert McCartney, formerly of the Ulster Unionist Party, to contest a by-election the North Down by-election, 1995 and then further constituted to contest the 1996...
  
  , existed 1995 to 2008
• Northern Ireland Unionist Party
  Northern Ireland Unionist Party
  The Northern Ireland Unionist Party was a small political party in Northern Ireland. It was formed in January 1999 as a splinter party from the UK Unionist Party . This split was caused by disagreement between the five UKUP members of the Northern Ireland Assembly...
  
  , existed 1999 to 2008

• Scottish Conservative and Unionist Party, full name of what is usually referred to as the Scottish Conservative Party
• Scottish Unionist Party (1986), Scottish minor party of traditionalist unionists disillusioned with the Conservative government's signing of the Anglo-Irish Agreement
  Anglo-Irish Agreement
  The Anglo-Irish Agreement was an agreement between the United Kingdom and Ireland which aimed to help bring an end to the Troubles in Northern Ireland...
  
  
• Unionist Party (Scotland), centre-right party that existed between 1912 and 1965, dominant force in Scottish politics until the late 1950s

India (under British rule)

• Unionist Party (Punjab) - a major political party in the former Punjab Province until 1947.

Worldwide

Nation	Party/Parties
Canada	Unionist Party (Canada) Unionist Party (Canada) The Unionist Party was formed in 1917 by Members of Parliament in Canada who supported the "Union government" formed by Sir Robert Borden during the First World War....  of 1917-1920 Unionest Party Unionest Party The Unionest Party was a provincial political party in Saskatchewan, Canada, in the early 1980s, that advocated union between the four western provinces of Canada and the United States....
Denmark	Union Party (Faroe Islands)
Egypt	National Progressive Unionist Party National Progressive Unionist Party The National Progressive Unionist Party is a socialist political party in Egypt. The party is considered to be the defender of the principles of the 1952 Revolution...
Guatemala	Unionist Party Unionist Party (Guatemala) The Unionist Party is a conservative political party in Guatemala, who advocates the re-creation of a Central American union....
Nicaragua	Central American Unionist Party Central American Unionist Party The Central American Unionist Party is a center-right Nicaraguan political party.PUCA was originally established as a cultural grouping advocating 'Central Americanization' in 1904. Renamed the Committee of State in 1944, it began to act as a political party after the Sandanistas gained power in...
South Africa	Unionist Party Unionist Party (South Africa) The Unionist Party of South Africa was a pre-apartheid South African political party, which contested elections to the Union of South Africa parliament from the 1910 South African general election until its merger into the South African Party just before the 1921 South African general...
Syria	Arab Socialist Unionist Movement Socialist Unionist Democratic Party Unionist Socialist Party
Tunisia	Unionist Democratic Union Unionist Democratic Union The Unionist Democratic Union is an opposition political party in Tunisia. It has a pan-Arabist ideology, and holds nine seats in the Chamber of Deputies, making it the fourth-largest party....
Yemen	Nasserite Unionist Party

See also

• Unionism (disambiguation)
• Unionist (disambiguation)
• Separatism
  Separatism
  Separatism is the advocacy of a state of cultural, ethnic, tribal, religious, racial, governmental or gender separation from the larger group. While it often refers to full political secession, separatist groups may seek nothing more than greater autonomy...