Tŷ Mawr

Tŷ Mawr (sometimes Ty Mawr) means "big house" in Welsh and may refer to the following historical houses or areas in Wales:

• Tŷ Mawr, Castle Caereinion in Powys
• Tŷ Mawr, Dingestow in Monmouthshire
• Tŷ Mawr Wybrnant, a National Trust property in Conwy County Borough
• Caeau Ty-mawr, a Site of Special Scientific Interest in Brecknock, Powys
• Holyhead Mountain Hut Circles (Welsh: Cytiau Tŷ Mawr), a group of prehistoric dwellings on Holy Island, Anglesey
• Ty Mawr Burial Chamber, a dolmen in Anglesey, Wales
• Tŷ Mawr, Wrexham, a country park in Wrexham County Borough
• Ty Mawr Reservoir, a reservoir in Wrexham County Borough
• Tŷ-Mawr Lime Ltd, a supplier of historic lime-based construction supplies.