Castra is a rural locality in the local government area (LGA) of Central Coast in the North-west and west LGA region of Tasmania. The locality is about south of the town of Ulverstone. The 2021 census recorded a population of 41 for Castra.
Castra is a confirmed locality.
Most of the boundaries are survey lines.
Route C124 (Central Castra Road) passes through from north to south.