Llangaffo is a village in Anglesey, in north-west Wales. It lies along the B4419 and B4421 roads, north of Dwyran, south of Gaerwen and northwest of Llanidan. It is named after Caffo, a 6th-century saint. A church, St Caffo's Church, is named after him. A war memorial, a village hall and a primary school are also located in the village. The 1851 census recorded 138 people in the village, 75 males, 63 females and a parish area of . It is in the community of Rhosyr. The 2011 census recorded a population of 357. Geography Llangaffo is a parish in the hundred of Menai, county Anglesey. It is located northwest of Caernarfon and south of Llangefni. It is in the vicinity of the North Wales Coast Line, although the nearest station (Gaerwen railway station) closed in 1966. The village is situated on a vantage hill ridge that provides vistas of pastureland and the hills of Snowdonia and the Menai Strait. The Snowdonian mountains terminate in the west with the abrupt precipices of Yr Eifl. It covers an extensive tract of land, of which a large portion is marshy, some part hilly, and the remainder in a fair state of cultivation. In 1790, an act of parliament was obtained for more effectually embanking the marshes called Malltraeth and Corsddeuga, under the provisions of which were allotted to the several proprietors of land in this parish. The soil is in general fertile, and the lower grounds afford excellent pasturage for cattle. The surrounding scenery is varied, while the higher grounds afford vistas over the adjacent countryside. Mats are manufactured from the seaweed extracted from the marshy area. It is in the community of Rhosyr. St Caffo's Church St Caffo's Church was constructed in 1846 to replace the previous medieval church on the site. The new building includes a number of monuments from the old church, and has a spire which is a prominent local landmark. The churchyard has part of a stone cross dating from the 9th or 10th century, and some gravestones from the 9th to 11th centuries. It is dedicated to St Caffo, a 6th-century martyr who was killed in the vicinity. The church is still in use as part of the Church in Wales, one of four churches in a combined parish. It is a Grade II listed building, a designation given to "buildings of special interest, which warrant