Greencastle, County Tyrone
Greencastle () is a hamlet in County Tyrone, Northern Ireland. It is within the townland of Sheskinshule (). The village sits at a crossroads in the foothills of the Sperrin Mountains with the Owenkillew and Owenreagh rivers running nearby. It had a population of 153 people in the 2001 Census. In 2012, a Real IRA training camp was discovered in the hamlet, leading to four people jailed for terrorism offences in 2014.