Deir

Deir or DEIR may refer to:


 * Deir in Glossary of Arabic toponyms
 * Ed-Deir, Petra, English: 'The Monastery', a monumental rock-cut structure in Jordan
 * Tell Deir, an archaeological site in Lebanon
 * Deir ez-Zor or Ad-Deir, a city in Syria
 * Draft environmental impact report, a document required in United States environmental law

People with the surname

 * Edward Deir (1915–1990), Canadian canoeist