The parish of Lezant is in the Launceston registration district. The county border with Devon forms the parish's eastern boundary. It is bounded on the north by South Petherwin and Lawhitton. The population of the parish in the 2001 census was 751.
Lezant parish church is dedicated to St Michael and was considerably restored in 1869. There was formerly an ancient chapel at Trecarrel (or Trecarrell) (see below) dedicated to St Mary Magdalene but it no longer exists.
At Trecarrel is the hall built by Sir Henry Trecarrel (now used as a barn) very early in the 16th century. The carved stones intended to embellish the hall were afterwards used in the building of the Parish Church of St Mary Magdalene at Launceston. The hall is impressive with fine Perpendicular windows and oak wagon roof; the chapel was still in existence in 1925.King Charles I arrived in Cornwall and spent the night at Trecarrel, 1 August 1644.