Llangystennin

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Llangystennin
Saint Cystennin's church at Llangwstennin
Llangystennin Location within Conwy
OS grid reference	SH766688
Community	Llandudno
Principal area	Conwy
Country	Wales
Sovereign state	United Kingdom
Post town	LLANDUDNO JUNCTION
Postcode district	LL31
Dialling code	01492
Police	North Wales
Fire	North Wales
Ambulance	Welsh
UK Parliament	Bangor Aberconwy
Senedd Cymru – Welsh Parliament	Aberconwy
List of places UK Wales Conwy 53°17′49″N 3°46′08″W / 53.297°N 3.769°W / 53.297; -3.769

Llangystennin (sometimes spelt Llangwstennin) is a rural parish to the south-east of Llandudno and Llanrhos in Conwy County Borough, north Wales.

Llangystennin includes Llangwstennin Hall, the villages of Mochdre, Pabo and Bryn Pydew and the small town of Llandudno Junction.

The parish takes its name from St. Cystennin (Constantine) who is said to be a son of St. Helen of Caernarfon (Elen Luyddog) together with whom and with his brother St. Peblig he is credited with introducing into Wales in the 5th century the Celtic form of monasticism from Gaul.^{[citation needed]}