Benllech is a small town on the Isle of Anglesey in Wales. It is in the community of Llanfair-Mathafarn-Eithaf, which has a population of 3,382, making it the 5th largest town by population on the island. The name of Benllech village had been removed by the time of the 2011 census with the community being listed under Llanfair-Mathafarn-Eithaf with the electoral ward being listed under Llanddyfnan.