Oneilland West
| Oneilland West Uí Nialláin Thiar(Irish) | |
|---|---|
| Location of Oneilland West, County Armagh, Northern Ireland. | |
| Sovereign state | United Kingdom | 
| Country | Northern Ireland | 
| County | Armagh | 
Oneilland West (from Irish Uí Nialláin, the name of an ancient Gaelic district) is a barony in County Armagh, Northern Ireland. It is also called Clancann (Clann Chana), after the Mac Cana clan. It lies in the north of the county on the south-western shore of Lough Neagh and the border of County Tyrone. Oneilland West is bordered by five other baronies: Armagh to the west; Dungannon Middle to the north-west; Oneilland East to the north-east; Orior Lower to the south-east; and Kinelarty to the south.