St Blazey (Cornish: Lanndreth)[3] is an electoral division of Cornwall in the United Kingdom which returns one member to sit on Cornwall Council.

The current division represents St Blazey and Biscovey as well as the hamlet of Bodelva and the western part of Par.

It also covers the site of the Eden Project and Tregrehan House.

[5][6] The former division represented the town of St Blazey, and the hamlets of Tywardreath Highway, Porcupine, Penpillick.

The hamlet of Bodelva was shared with the Par and St Blazey Gate division and the hamlet of Kilhallon was shared with the Fowey and Tywardreath division.