Greencastle is a commercial fishing port and village located in the north of the Inishowen Peninsula on the north coast of Co Donegal. It is located close to Moville and is about 35km from Derry. Greencastle's name comes from the castle in the area, which, in turn, may have derived its name from the green freestone with which it was built. The castle, originally built by the Anglo-Normans, is also known as Northburgh Castle. The first proper pier at Greencastle was built in 1813 and has been added to several times since. oday, as well as being a tie up for trawlers and salmon boats and the home of the Greencastle Fishermen's Co-Op, the Foyle Fishermen's Co-Op and Fresco Seafoods, the pier also serves as a disembarkment point from the Magilligan-Greencastle ferry. The Lough Foyle Ferry Company also runs a Lough Swilly ferry service that runs between Buncrana and Rathmullan seasonly. Greencastle is also one of the disembarkation ports for cruise ships visiting Derry.The National Fisheries College (NFC) is located in Greencastle, which is also home to a number of shops, restaurants, pubs and a golf club. There is also a couple of schools in the area.