Trewen

Trewen (Trewynn) is a hamlet and a civil parish in east Cornwall, England, United Kingdom The parish is just east of Bodmin Moor in the River Inny valley and lies in the Registration District of Launceston.

Trewen parish is bounded to the north by Egloskerry parish, to the east by St Thomas-by-Launceston, to the south by South Petherwin and to the west by Altarnun and Laneast parishes. The population of Trewen parish in the 2001 census was 134.

The hamlet of Trewen is situated 5 miles (8 km) west of Launceston. The parish church of St Michael is in the village at. The little church has a bellcote rather than a tower. "The church is an ancient granite building in the Early Perpendicular style, which was restored in 1863/1864; it comprises a chancel, nave, and north aisle". The font is Norman, square and plain. The only other hamlet in the parish of Trewen is Piper's Pool which straddles the A395 road.