The village of Tregadillett is located within the county of Cornwall.
The Parish Church is called Tregadillett: St Mary's Mission and serves the parish of Launceston and the benefice of Launceston and belongs to the diocese of Truro.
Tregadillett is situated in the South West (England) region of the UK and is governed by Cornwall, council.
The village of Tregadillett is in the Cornwall and Isles of Scilly region of Cornwall and Isles of Scilly within South West (England).