Northern Ireland is a part of the United Kingdom in the north-east of the island of Ireland, variously described as a country, province or region. Northern Ireland shares a border to the south and west with the Republic of Ireland. In 2011, its population was 1,810,863, constituting about 30% of the island's total population and about 3% of the UK's population. Established by the Northern Ireland Act 1998 as part of the Good Friday Agreement, the Northern Ireland Assembly holds responsibility for a range of devolved policy matters, while other areas are reserved for the British government. Northern Ireland co-operates with the Republic of Ireland in some areas, and the Agreement granted the Republic the ability to "put forward views and proposals" with "determined efforts to resolve disagreements between the two governments".
Northern Ireland was created in 1921, when Ireland was partitioned between Northern Ireland and Southern Ireland by the Government of Ireland Act 1920. Unlike Southern Ireland, which would become the Irish Free State in 1922, the majority of Northern Ireland's population were unionists, who wanted to remain within the United Kingdom. Most of these were the Protestant descendants of colonists from Great Britain. However, a significant minority, mostly Catholics, were nationalists who wanted a united Ireland independent of British rule. Today, the former generally see themselves as British and the latter generally see themselves as Irish, while a distinct Northern Irish or Ulster identity is claimed both by a large minority of Catholics and Protestants and by many of those who are non-aligned.
For most of the 20th century, when it came into existence, Northern Ireland was marked by discrimination and hostility between these two sides in what First Minister of Northern Ireland, David Trimble, called a "cold house" for Catholics. In the late 1960s, conflict between state forces and chiefly Protestant unionists on the one hand, and chiefly Catholic nationalists on the other, erupted into three decades of violence known as the Troubles, which claimed over 3,500 lives and caused over 50,000 casualties. The 1998 Good Friday Agreement was a major step in the peace process, including the decommissioning of weapons, although sectarianism and religious segregation still remain major social problems, and sporadic violence has continued.
Northern Ireland has historically been the most industrialised region of Ireland. After declining as a result of the political and social turmoil of the Troubles, its economy has grown significantly since the late 1990s. The initial growth came from the "peace dividend" and the links which increased trade with the Republic of Ireland, continuing with a significant increase in tourism, investment and business from around the world. Unemployment in Northern Ireland peaked at 17.2% in 1986, dropping to 6.1% for June–August 2014 and down by 1.2 percentage points over the year, similar to the UK figure of 6.2%. 58.2% of those unemployed had been unemployed for over a year.
Prominent artists and sportspeople from Northern Ireland include Van Morrison, Rory McIlroy, Joey Dunlop, Wayne McCullough and George Best. Some people from Northern Ireland prefer to identify as Irish (e.g., poet Seamus Heaney and actor Liam Neeson) while others prefer to identify as British (e.g. actor Kenneth Branagh). Cultural links between Northern Ireland, the rest of Ireland, and the rest of the UK are complex, with Northern Ireland sharing both the culture of Ireland and the culture of the United Kingdom. In many sports, the island of Ireland fields a single team, a notable exception being association football. Northern Ireland competes separately at the Commonwealth Games, and people from Northern Ireland may compete for either Great Britain or Ireland at the Olympic Games.