Illogan and Portreath is an electoral division of Cornwall in the United Kingdom which returns one member to sit on Cornwall Council.

The current councillor is David Crabtree, a member of the Conservative Party.

[1] Illogan and Portreath represents the eastern portion of the parish of Illogan, the entirety of the parish of Portreath, and a small northern portion of the parish of Carn Brea.

This includes the villages and hamlets of Cambrose, Illogan, Portreath, and West Tolgus.

The electoral division is bounded to the north by the Celtic Sea, to the northeast by the electoral division of St Agnes, to the east by the electoral division of Redruth North, and to the south and west by the electoral division of Pool and Tehidy.