•
Afon Dulas, two rivers (North Dulas and South Dulas), tributaries of the
Afon Dyfi in Mid Wales •
Afon Dulas, Llanidloes, a headwater tributary of the
River Severn, in Powys, Wales •
Dulas, Irfon, a left-bank tributary of the Afon Irfon, in Powys, Wales •
Dulas, Ithon, a minor right-bank tributary of the River Ithon, in Powys, Wales •
River Dulas, a tributary of the River Teifi, in West Wales • Afon Dulas,
Llanddulas, North Wales ==Other uses==