Killetra is an ancient Irish district in what is now southern County Londonderry

County Londonderry

The place name Derry is an anglicisation of the old Irish Daire meaning oak-grove or oak-wood. As with the city, its name is subject to the Derry/Londonderry name dispute, with the form Derry preferred by nationalists and Londonderry preferred by unionists...

, 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...

. Killetra along with the ancient districts of Clandonnell

Clandonnell

Clandonnell is an ancient Irish district in what is now southern County Londonderry, Northern Ireland. Clandonnell along with the ancient districts of Glenconkeyne, Killetra, and Tomlagh, comprised the former barony of Loughinsholin, with Clandonnell forming the northern part reaching as far south...

, Glenconkeyne

Glenconkeyne

Glenconkeyne is an ancient Irish district in what is now southern County Londonderry, Northern Ireland. Glenconkeyne formed the western portion of the former barony of Loughinsholin, with the ancient districts of Clandonnell, Killetra, and Tomlagh comprising the rest...

, and Tomlagh

Tomlagh

Tomlagh is an ancient Irish district in what is now southern County Londonderry, Northern Ireland. Killetra along with the ancient districts of Clandonnell, Glenconkeyne, and Killetra, comprised the former barony of Loughinsholin. Tomlagh is stated as forming a four or five mile wide district...

, comprised the former barony of Loughinsholin, with Killetra reaching from the present-day town of Magherafelt to the Ballinderry

Ballinderry

Ballinderry is a small civil and ecclesiastical parish on both sides of the County Londonderry / County Tyrone border in Northern Ireland. It is a rural parish of about 350 houses and lies on the western shores of Lough Neagh....

River.

As a result of the dense forest that used to cover Killetra and Glenconkeyne both formed the most inaccessible part of the whole of Ulster.