Greysteel or Gresteel is a village in County Londonderry, Northern Ireland. It lies 9 miles (14 km) to the east of Derry and 7 miles (11 km) to the west of Limavady on the main A2 coast road between Limavady and Derry, overlooking Lough Foyle. In the 2021 Census it had a population of 1,418 people. It is situated within Causeway Coast and Glens district.

The village lies mostly within the townlands of Gresteel More and Gresteel Beg. The name "Greysteel" may be a part-translation of the Irish Glas-stiall, meaning "grey strip (of land)", and the Placenames Database of Ireland gives this as the Irish name of the village. An older English name for the area was "Glasteele".

During the Troubles, nine people were killed in the Greysteel area:

The village is adequately served in terms of public transport and City of Derry Airport is located 4 km to the west.

Greysteel is classified as a village by the NI Statistics and Research Agency (NISRA) (i.e. with a population between 1,000 and 2,250 people). On Census day (29 April 2001) there were 1,229 people living in Greysteel. Of these:

For more details see: NI Neighbourhood Information Service