Desertmartin (locally [ˈdɛzərtˈmartn], from Irish Díseart Mhartain, meaning "hermitage of St. Martin") is a small village in County Londonderry, Northern Ireland. It is four miles from Magherafelt, at the foot of Slieve Gallion. In the 2001 Census Desertmartin greater area had a population of 1,276. It had a population of 2257 in 1837 and 3101 in 1910. It lies within Desertmartin parish, Magherafelt District Council, and the historic barony of Loughinsholin. Neighbouring settlements include Draperstown, Magherafelt, Moneymore, and Tobermore.
When County Coleraine was created in 1585, its administration was meant to be carried out in the town of Coleraine. However, the jail and courthouse were built in Desertmartin, the middle of the Barony of Loughinsholin, which then lay in neighbouring County Tyrone. After the Flight of the Earls the escheated land was transferred to County Coleraine. The enlarged county was renamed County Londonderry.
- St Patrick's, townland of Keenaght (Roman Catholic) (Old Chapel).
- St Patrick's, townland of Keenaght (Roman Catholic) (New Chapel).
- St. Mary’s, townland of Coolcalm (Roman Catholic) Church and adjacent Parochial House are landmark buildings.
- Church of the Nazarene (a branch of the denomination of the same name based on Wesleyan tradition).
- St. Comgall's Church (Church of Ireland) is a visually and historically significant building and a local landmark. It occupies the site of an older Medieval church and is a listed building.
- St. Columb's Primary School (Roman Catholic)
- Desertmartin Primary School
- Knocknagin Primary School (Roman Catholic)
Desertmartin lies on the foot of Slieve Gallion, on the eastern edge of the Sperrin Mountains. It has two peaks: the southwestern peak at Glenarudda Mountain and Tintagh Mountain reaches a height of 528 metres (1,730 ft), and is the 397th highest peak in Ireland; the northeastern peak reaches a height of 496 metres (1,630 ft), and is the 469th highest peak in Ireland; it is also the easternmost mountain-top in the Sperrins.
The parents of Declan Donnelly from the Ant & Dec duo were from the Desertmartin area before moving to Newcastle in the 1950's
- St. Martin's Desertmartin Gaelic Athletic Association St Martin's GAA Club
- Desertmartin Football Club
- Desertmartin has a world famous motocross track at which big motocross events are held, including the BYMX and the British Motocross Championship. The Motocross Grand Prix of Ireland was held at Desertmartin motocross race track in September 2005.
- Toner, Gregory: Place-Names of Northern Ireland, page 85. Queen's University of Belfast, 1996, ISBN 0-85389-613-5
- Flanagan, Deirdre & Laurence: Irish Place Names, page 202. Gill & Macmillan Ltd., 2002. ISBN 0-7171-3396-6
- Notes on the Place Names of the Parishes and Townlands of the County of Londonderry, 1925, Alfred Moore Munn, Clerk of the Crown and Peace of the City and County of Londonderry
- BBC Local History
- "Desertmartin station" (PDF). Railscot - Irish Railways. Retrieved 2007-09-23.
- NI Neighbourhood Information System
- Motocross Grand Prix of Ireland
- Tom Paulin - Desertmartin
- Desertmartin Directory, 1910
- Lewis's Topographical Dictionary, 1837
- Draft Magherafelt Area Plan 2015