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Main street in 2007
Llanuwchllyn is located in Gwynedd
Location within Gwynedd
Area116.93 km2 (45.15 sq mi)
Population617 (2011)
• Density5/km2 (13/sq mi)
OS grid referenceSH877299
  • Llanuwchllyn
Principal area
Sovereign stateUnited Kingdom
Post townBALA
Postcode districtLL23
Dialling code01678
PoliceNorth Wales
FireNorth Wales
UK Parliament
Senedd Cymru – Welsh Parliament
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 (Welsh: [ɬaˈnɨuχɬɨn] (About this soundlisten)) is a village and community in Gwynedd, Wales, near the southern end of Bala Lake (Llyn Tegid). The electoral ward population according to the United Kingdom Census 2001 was 834,[1] of whom about 81% were Welsh-speaking.[2] The figures for the community at the 2011 census were: population 617; Welsh speakers 82%.[3] It is one of the most sparsely populated communities in Wales.

The electoral ward includes the small settlement of Llangywer.

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.