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Main street in 2007
Llanuwchllyn is located in Gwynedd
Llanuwchllyn shown within Gwynedd
Population 617 (2011)
OS grid reference SH877299
  • Llanuwchllyn
Principal area
Country Wales
Sovereign state United Kingdom
Post town BALA
Postcode district LL23
Dialling code 01678
Police North Wales
Fire North Wales
Ambulance Welsh
EU Parliament Wales
UK Parliament
Welsh Assembly
List of places
52°51′18″N 3°39′58″W / 52.855°N 3.666°W / 52.855; -3.666Coordinates: 52°51′18″N 3°39′58″W / 52.855°N 3.666°W / 52.855; -3.666
St Deiniol's Church
Medieval tomb at Llanuwchllyn

Llanuwchllyn is a village and community in Gwynedd, Wales, near the southern end of Bala Lake (Llyn Tegid). Its population according to the United Kingdom Census 2001 was 834,[1] of whom about 81% were Welsh-speaking.[2] The figures for the 2011 census were: population 617; Welsh speakers 82%.[3]

The parish church of St Deiniol is a Grade II* listed building.[4]

Llanuwchllyn railway station is the headquarters of the narrow gauge Bala Lake Railway, centred on the former Great Western Railway station on the standard-gauge line from Ruabon to Barmouth.

The village was the birthplace of Welsh language author and educationalist Owen Morgan Edwards.

Caer Gai, a Roman fort near Llanuwchllyn, was traditionally known as the home of Cei, the character in the Arthurian legend known in English as Sir Kay. Poets of the 15th century recorded a story, ultimately deriving from the Prose Merlin included in the Lancelot-Grail and the Post-Vulgate Cycle, that King Arthur and Cei were brought up at Caer Gai as foster brothers.[5] Caer Gai is also Grade II* listed.[6]


An electoral ward with same name exists. This ward also includes the community of Llangywer with a total population taken at the 2011 census of 877.[7]


  1. ^ Llanuwchllyn Census 2001 National Office of Statistics
  2. ^ Welsh-speaking statistics Welsh Language Board
  3. ^ "Community population 2011 plus percentage of welsh speakers". Retrieved 17 May 2015.
  4. ^ "Parish Church of St Deiniol, Llanuwchllyn". British Listed Buildings. Retrieved 17 December 2013.
  5. ^ Bromwich, p. 311.
  6. ^ "Caer Gai, including adjoining forecourt walls to the NE, Llanuwchllyn". British Listed Buildings. Retrieved 17 December 2013.
  7. ^ "Ward population 2011". Retrieved 17 May 2015.