Black Lough may refer to:

• Ballysaggart Lough, in Dungannon, County Tyrone, Northern Ireland
• Black Lough (Kerry) in the Gap of Dunloe, a mountain pass in County Kerry, Republic of Ireland

• Grad zaprice
• Grad ZG
• Grad Šrotenturn
• Graebe–Ullmann synthesis
• Graebles
• Graebn.
• Graechen Guillaume
• Graecoanatolica anatolica
• Graecoanatolica brevis
• Graecoanatolica conica
• Graecoanatolica dinarica
• Graecoanatolica kocapinarica
• Graecoanatolica lacustristurca
• Graecoanatolica pamphylica
• Graeco-Macedonian
• Graeco-Macedonian languages
• Graecomans
• Graecophile
• Graeco-Phrygian
• Graeco-Phrygian languages
• Graecopithecus
• Graecopithecus freybergi
• Graecum est; non legitur
• GRAEF
• Graefenberg (disambiguation)