The station is 320 miles 78 chains (320.98 mi; 516.6 km) from the zero point at London Paddington measured via Box and Plymouth Millbay.

[4] This was an important harbour with a busy fishing trade and tin and copper mines; the new railway brought it artists and then tourists.

[6] Beyond the St Ives branch platform was the station goods yard and sidings which served a china clay dry for a few years.

The booking office is staffed for part of the day and is located in the west-facing section which faces the station car park.

The northern range incorporates staff accommodation as well as refreshment facilities which appeared in a list of the ten best station cafes published in The Guardian in 2009.

At the west end of this is a covered footbridge which links with the main westbound platform for trains to Penzance, and a large wooden shelter is provided here.

[17] The project provoked discussion: it was supported by local MP Derek Thomas and Connor Donnithorne, the cabinet member responsible for transport at Cornwall Council, while some residents opposed the plans.

Standing at this end of the station the line to St Ives curves away to the left over Western Growers Crossing towards the covered way beneath the A30 road.

[19] The signal box is situated at the east end of the station between the main line and the St Ives branch.

St Erth is served by all Great Western Railway trains services on the Cornish Main Line between Penzance and Plymouth.