Llanfairpwllgwyngyll or Llanfair Pwllgwyngyll, often shortened to Llanfairpwll and sometimes to Llanfair PG, is a village and community on the Isle of Anglesey, Wales. It is located on the Menai Strait, next to the Britannia Bridge. At the 2011 Census the population was 3,107, of whom 71% could speak Welsh. In 2021, the population decreased to 2,900. It is the sixth largest settlement in the county by population.