The Gallarus Oratory (Irish: Séipéilín Ghallarais, Gallarus being interpreted as either 'rocky headland' (Gall-iorrus) or 'house or shelter for foreigner(s)' (Gall Aras) is a chapel on the Dingle Peninsula, County Kerry, Ireland. It has been presented variously as an early-Christian stone church by antiquary Charles Smith, in 1756; a 12th-century Romanesque church by archaeologist Peter Harbison in 1970; a shelter for pilgrims by the same in 1994. The local tradition prevalent at the time of Charles Smith attributed it to one Griffith More, being a funerary chapel built by him or his family at their burial place.

The oratory overlooks the harbour at Ard na Caithne (formerly also called Smerwick) on the Dingle Peninsula.