Allens Rivulet is a rural residential locality in the local government area (LGA) of Kingborough in the Hobart LGA region of Tasmania. The locality is about south-west of the town of Kingston. The 2021 census recorded a population of 506 for Allens Rivulet.
Allens Rivulet was gazetted as a locality in 1971.
Allens Rivulet (the stream) flows through from west to north-east. Most of the boundaries are survey lines.
Route C622 (Sandfly Road) passes to the north. Access is provided by Allens Rivulet Road.