| Official Name: | Castlesessagh |
| Map Type: | Northern Ireland |
| Coordinates: | 54.7083°N -7.5934°W |
| Belfast Distance: | 85 miles |
| Population: | 165 |
| Population Ref: | (2008 estimate) |
| Irish Grid Reference: | H262845 |
| Country: | Northern Ireland |
| Post Town: | CASTLEDERG |
| Postcode Area: | BT |
| Postcode District: | BT81 |
| Dial Code: | 028, +44 28 |
| Hide Services: | yes |
| Static Image: | Standing stone, Castlederg - geograph.org.uk - 380702.jpg |
| Static Image Caption: | Standing stone in the eastern part of Castlesessagh |
Castlesessagh is a townland of 165 acres (67.53 ha) in County Tyrone, Northern Ireland. It is situated in the civil parish of Urney and the historic barony of Omagh West.[1] Parts of the town of Castlederg are located in this townland.