Melin Llandegfan Llandegfan · Isle of Anglesey · Wales

Melin Llandegfan stands at the north end of Llandegfan, set back from the south-west side of Bro Llewellyn. The tower is now enclosed by the later growth of the village, but it remains a visible survival of the former wind-powered corn-milling landscape of Anglesey.

The mill was probably built in the early nineteenth century and is thought to date from the 1820s. It first appears on Dawson's map of 1831. The mill worked as a wind-powered corn mill until the early twentieth century and had ceased working before the First World War. By 1918 it was marked as an old windmill on the Ordnance Survey one-inch map.

The tower retained more of its working form into the early twentieth century. Rex Wailes recorded that the cap and remains of the sails were still in position in 1929. By 1937 those remains had disappeared and the top of the tower had been reduced. The surviving structure is a circular windmill tower with tapering rubble-masonry walls, part rendered. It was originally five storeys high but was reduced to a little over four storeys, with square-headed openings including a blocked ground-floor entrance.

After milling ended, the tower was adapted to serve a different local purpose. A large water tank was installed inside the tower to provide a reservoir for the village. This was initially successful, but increasing demand during the 1950s and 1960s made the arrangement inadequate. The pipework was disconnected and the tank was finally removed in 1989. Melin Llandegfan was listed at Grade II in 1968 as a substantially intact windmill tower, one of the surviving examples of Anglesey's former windmill landscape.