The village of Sarn Meyllteyrn is on the Llyn peninsula, County Gwynedd, North West Wales. It lies south of Tudweiliog, west of Botwnnog and north west of Abersoch.
Nearby towns and villages include Bryncroes, Pen-y-graig, Bryn Mawr, Llangwnnadl and Bryn croes.
There are many walks close to Sarn Myllteryn and the Llyn Coastal Path passes within 4 km of the village. Close by is the hill of Mynydd Rhiw which at 305 metres offers fine views of the Llyn Peninsula.