Trefarthen
Trefarthen Location within Anglesey
OS grid reference	SH 4832 6607
• Cardiff	125.6 mi (202.1 km)
• London	209.2 mi (336.7 km)
Community	Llanidan
Principal area	Anglesey
Country	Wales
Sovereign state	United Kingdom
Post town	Llanfair Pwllgwyngyll
Police	North Wales
Fire	North Wales
Ambulance	Welsh
UK Parliament	Ynys Môn
Senedd Cymru – Welsh Parliament	Ynys Môn
List of places UK Wales Anglesey 53°10′12″N 4°16′15″W / 53.170111°N 4.270698°W / 53.170111; -4.270698

Trefarthen is a village in the community of Llanidan, Anglesey, Wales, which is 125.6 miles (202.1 km) from Cardiff and 209.2 miles (336.7 km) from London.^[1]

Of historical and archaeological interest are a Georgian mansion and the possible site of a 16th-century house.^[2]

• List of localities in Wales by population