Derrytresk
Derrytresk is a townland outside Coalisland, County Tyrone, Northern Ireland and is close to the shores of Lough Neagh. It is situated in the historic barony of Dungannon Middle and the Civil [parishes in Ireland|civil parish] of Clonoe and covers an area of 1020 acres. Derrytresk consists of sub-townlands: Derryvarne, Derrykiltena and Derrynahaskila.
The name derives from the Irish: Doire Triosca.
Population
The population of the townland declined during the 19th century:| Year | 1841 | 1851 | 1861 | 1871 | 1881 | 1991 |
| Population | 523 | 493 | 451 | 445 | 383 | 442 |
| Houses | 81 | 76 | 79 | 83 | 76 | 80 |