Greencastle

Greencastle or Green Castle may refer to:

• Green Castle (Grünes Schloss), Weimar; see Duchess Anna Amalia Library

• Greencastle, County Donegal, Republic of Ireland
• Greencastle, County Down, Northern Ireland
• Greencastle, County Tyrone, Northern Ireland

• Green Castle, Portknockie, an Iron Age and Pictish promontory fort

• 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

• Greencastle (film)