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
See also , include many place names and names of buildings, as deir is Arabic for 'monastery' or 'convent'
Dair, the seventh letter of the Ogham alphabet Der (disambiguation) Deyr (disambiguation)