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 in Conwy County Borough
 * Caeau Ty-mawr, a Site of Special Scientific Interest in Brecknock, Powys
 * Holyhead Mountain Hut Circles (Cytiau Tŷ Mawr), a group of prehistoric dwellings on Holy Island, Anglesey
 * Tŷ Mawr, Wrexham, country park in Wrexham County Borough
 * Ty Mawr Reservoir, reservoir in Wrexham County Borough