St Erth (Cornish: Lannudhno)[1] is a civil parish and village in Cornwall, England, United Kingdom.

The St Erth railway station is 0.75 miles from the village, at Rose-an-Grouse, and is on the Cornish Main Line from London Paddington to Penzance.

[2] The parish shares boundaries with Ludgvan in the west, Hayle in the north, and St Hilary in the south.

Because of this major obstacle to trade, a turnpike trust was formed, with Henry Harvey a trustee, to build the causeway which now takes the road below the plantation west to the Old Quay House.

The clay was the source of significant fossil finds and in 1886 the Royal Society obtained a government grant to search the shell-beds.

Another good source of clay for fixing candles to miners' helmets was on St Agnes Beacon.

[9] The ornate wooden roofs of the nave and aisles and fine oak screen decorated with the Four Evangelists are due to the restoration of 1874.

[10][11] The church is sited in a wooded area and the churchyard, according to Charles Henderson, "greatly enhances the building".

The names of eight places in the parish are recorded as having chapels or shrines in the medieval registers, including Bosworgey (St Mary Magdalene) and Gurlyn.