Glendalough is a former monastic settlement in County Wicklow, Ireland.
Glendalough may also refer to:
In Australia Glendalough (Melbourne), a heritage-listed house in Travancore, Melbourne, Victoria Glendalough, Rosewood, a heritage-listed villa in Rosewood, City of Ipswich, Queensland Glendalough, Western Australia, a suburb of Perth Electoral district of Glendalough Glendalough railway station
In Ireland The former Diocese of Glendalough The current Diocese of Dublin and Glendalough
In the United States Glendalough State Park, Minnesota, US
See also Bodleian Library, MS Rawlinson B 502, sometimes called The Book of Glendalough