County Tyrone in the context of "Tír Eoghain"

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.

In hillslope geomorphology, a rill is a shallow channel (no more than a few inches/centimeters deep) cut into soil by the erosive action of flowing surface water. Similar but smaller incised channels are known as microrills; larger incised channels are known as gullies.

Artificial rills are channels constructed to carry a water supply from a distant water source. In landscape or garden design, constructed rills are an aesthetic water feature.

Omagh (/ˈoʊmə, ˈoʊmɑː/; from Irish: An Ómaigh [ənˠ ˈoːmˠiː], meaning 'the virgin plain') is the county town of County Tyrone, Northern Ireland. It is situated where the rivers Drumragh and Camowen meet to form the Strule. Northern Ireland's capital city, Belfast, is 68 miles (109.5 km) to the east of Omagh, and Derry is 34 miles (55 km) to the north.

The town had a population of 20,458 at the 2021 census. At the time of 2011 census, the former district council, which was the largest in County Tyrone, had a population of 51,356. Omagh contains the headquarters of the Western Education and Library Board, and also houses offices for the Department of Agriculture, Environment and Rural Affairs at Sperrin House, the Department for Infrastructure and the Northern Ireland Roads Service at the Tyrone County Hall and the Northern Ireland Land & Property Services at Boaz House.

County Armagh (Irish: Contae Ard Mhacha [ˌaːɾˠd̪ˠ ˈwaxə]) is one of the six counties of Northern Ireland and one of the traditional thirty-two counties of Ireland. It is located in the province of Ulster and adjoins the southern shore of Lough Neagh. It borders the Northern Irish counties of Tyrone to the west and Down to the east. The county borders Louth and Monaghan to the south and southwest, which are in the Republic of Ireland. It is named after its county town, Armagh, which derives from the Irish Ard Mhacha, meaning "Macha's height". Macha was a sovereignty goddess in Irish mythology and is said to have been buried on a wooded hill around which the town of Armagh grew. County Armagh is colloquially known as the "Orchard County" because of its many apple orchards.

The county covers an area of 1,327 km (512 sq mi), making it the smallest of Northern Ireland's six counties by size and the sixth-smallest county on the island of Ireland. With a population of 194,394 as of the 2021 census, it is the fourth-most populous county in both Northern Ireland and Ulster. It is the 10th most populous of Ireland's 32 traditional counties, as well as the fifth-most densely populated. In addition to the city of Armagh and the western portion of the city of Newry, notable towns in the county include Lurgan, Portadown and Craigavon.

The Sperrins or Sperrin Mountains (Irish: Sliabh Speirín) are a mountain range in Northern Ireland. The range stretches from Strabane and Mullaghcarn in the west, to Slieve Gallion and the Glenshane Pass in the east, in the counties of Tyrone and Londonderry. The landscape is mostly moorland and blanket bog. The region has a population of some 150,000 and is a designated Area of Outstanding Natural Beauty.

The River Foyle (from Irish An Feabhal) is a river in west Ulster in the northwest of the island of Ireland, which flows from the confluence of the rivers Finn and Mourne at the towns of Lifford in County Donegal, Republic of Ireland, and Strabane in County Tyrone, Northern Ireland. From here it flows to the city of Derry, where it discharges into Lough Foyle and, ultimately, the Atlantic Ocean. The total length of the River Foyle is 32 km (20 mi). The river separates part of County Donegal from parts of both County Londonderry and County Tyrone. The district of County Donegal that borders the western bank of the River Foyle is traditionally known as the Laggan. This district includes the villages of St Johnston and Carrigans, both of which are nestled on the banks of the River.

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.