Germany • Green Castle (
Grünes Schloss),
Weimar; see
Duchess Anna Amalia Library Ireland •
Greencastle, County Donegal,
Republic of Ireland •
Greencastle, County Antrim, Northern Ireland, a townland and suburb of
Belfast •
Greencastle, County Down,
Northern Ireland •
Greencastle, County Tyrone, Northern Ireland
Scotland •
Green Castle, Portknockie, an Iron Age and
Pictish promontory fort United States •
Greencastle, Indiana, a city •
Greencastle, Missouri, a city •
Greencastle, Pennsylvania, a borough •
Greencastle, West Virginia, an unincorporated community •
Greencastle, Kanawha County, West Virginia, an unincorporated community ==Other uses==