Lanreath (Cornish: Lannreydhow) is a civil parish and a village in southeast Cornwall, England, United Kingdom.

[1] The name Lanreath (pronounced Lanreth) means 'church (Lann) of Raydhogh' and it has been known variously as Lanreythow, Lanrathew, or Lanrethou.

[2] At the time of the Domesday Book (1086) Lanreath was one of 28 manors held by Richard (son of Turolf) from Robert, Count of Mortain.

The monument to Charles Grylls and wife, of 1623, is ornate and unusual, being carved in wood.

A BBC documentary, Power to the People,[7] was broadcast about the plight of rural villages and the closure of Lanreath CE Primary School.