County Armagh in the context of "Battle of the Diamond"

Northern Ireland is divided into six counties, namely Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone. Six largely rural administrative counties based on these were among the eight primary local government areas of Northern Ireland from its 1921 creation until 1973. The other two local government areas were the urban county boroughs of Derry (geographically part of the County of Londonderry) and Belfast (geographically split between the counties of Antrim and Down).

The six counties date from the Kingdom of Ireland; five were created between 1570 and 1591 in the Tudor conquest of Ireland, while county Londonderry dates from 1613 and the Plantation of Ulster. The total number of counties in the island of Ireland is 32, with Northern Ireland and the Republic of Ireland often respectively called "the Six Counties" and "the Twenty-Six Counties", especially by Irish nationalists opposed to the partition of Ireland. The 1898–1973 administrative counties were subdivided into county districts. The two-tier county/district system was replaced with a single-tier of "districts", numbering 26 in 1973 and rationalised into 11 in 2015. The areas corresponding to the six counties and two county boroughs remain in use for some administrative purposes, and the six historic counties retain a popular identity.

The Plantation of Ulster (Irish: Plandáil Uladh; Ulster Scots: Plantin o Ulstèr) was the organised colonisation (plantation) of Ulster – a province of Ireland – by people from Great Britain during the reign of King James VI and I.

Small privately funded plantations by wealthy landowners began in 1606, while the official plantation began in 1609. Most of the land had been confiscated from the native Gaelic chiefs, several of whom had fled Ireland for mainland Europe in 1607 following the Nine Years' War against English rule. The official plantation comprised an estimated half a million acres (2,000 km) of arable land in counties Armagh, Cavan, Fermanagh, Tyrone, Donegal, and Londonderry. Land in counties Antrim, Down, and Monaghan was privately colonised with the king's support.

Newry (/ˈnjʊəri/; from Irish An Iúraigh) is a city in Northern Ireland, standing on the Clanrye river in counties Down and Armagh. It is near the border with the Republic of Ireland, on the main route between Belfast (34 miles/55 km away) and Dublin (67 miles/108 km away). The population was 27,913 in 2021.

Newry was founded in 1144 as a settlement around a Cistercian abbey. In the 16th century the English dissolved the abbey and built Bagenal's Castle on the site. Newry grew as a market town and a garrison, and became a port in 1742 when the Newry Canal was opened, the first summit-level canal in Ireland. A cathedral city, it is the episcopal seat of the Roman Catholic Diocese of Dromore. In 2002, as part of the Golden Jubilee of Elizabeth II, Newry was granted city status along with Lisburn.

County Down (Irish: Contae an Dúin) is one of the six counties of Northern Ireland, one of the nine counties of Ulster and one of the traditional thirty-two counties of Ireland. It covers an area of 961 sq mi (2,490 km) and has a population of 552,261. It borders County Antrim to the north, the Irish Sea to the east, County Armagh to the west, and County Louth across Carlingford Lough to the southwest.

In the east of the county is Strangford Lough and the Ards Peninsula. The largest settlement is Bangor, a city on the northeast coast. Three other large towns and cities are on its border: Newry lies on the western border with County Armagh. Lisburn and Belfast lie on the northern border with County Antrim. Down contains the southernmost point of Northern Ireland (Cranfield Point) and the easternmost point of Ireland (Burr Point).

The Loyal Orange Institution, commonly known as the Orange Order, is an international Protestant fraternal order based in Northern Ireland and primarily associated with Ulster Protestants. It also has lodges in England, Scotland, Wales and the Republic of Ireland, as well as in parts of the Commonwealth of Nations and the United States. Queen Elizabeth II disapproved of Orange marches, calling it "silly marching business".

The Orange Order was founded by Ulster Protestants in County Armagh in 1795, during a period of Protestant–Catholic sectarian conflict, as a fraternity sworn to maintain the Protestant Ascendancy in Ireland. The all-island Grand Orange Lodge of Ireland was established in 1798. Its name is a tribute to the Dutch-born Protestant king William of Orange, who defeated the Catholic English king James II in the Williamite–Jacobite War (1689–1691). The Order is best known for its yearly marches, the biggest of which are held on or around 12 July (The Twelfth), a public holiday in Northern Ireland.

The Armagh disturbances was a period of intense sectarian fighting in the 1780s and 1790s between the Ulster Protestant Peep o' Day Boys and the Roman Catholic Defenders, in County Armagh, Kingdom of Ireland, culminating in the Battle of the Diamond in 1795.

Armagh (/ɑːrˈmɑː/ ar-MAH; Irish: Ard Mhacha, IPA: [ˌaːɾˠd̪ˠ ˈwaxə], "Macha's height") is a city and the county town of County Armagh, in Northern Ireland, as well as a civil parish. It is the ecclesiastical capital of Ireland – the seat of the Archbishops of Armagh, the Primates of All Ireland for both the Roman Catholic Church and the Church of Ireland. In ancient times, nearby Navan Fort (Eamhain Mhacha) was a pagan ceremonial site and one of the great royal capitals of Gaelic Ireland. Today, Armagh is home to two cathedrals (both named after Saint Patrick) and the Armagh Observatory, and is known for its Georgian architecture.

Statistically classed as a medium-sized town by NISRA, Armagh was given city status in 1994 and Lord Mayoralty status in 2012. It had a population of 16,310 people in the 2021 Census.

The River Blackwater (Irish: An Abhainn Mhór) or Ulster Blackwater is a river mainly in County Armagh and County Tyrone, Northern Ireland. Its source is to the north of Fivemiletown, County Tyrone. The river divides County Armagh from County Tyrone and also divides County Tyrone from County Monaghan, making it part of the border between the United Kingdom and the Republic of Ireland.