The 2016 census recorded a population of 559 for the state suburb of Mountain River.

[1] The locality increasingly is a lifestyle destination, being only about 30 minutes south of the Tasmanian capital Hobart by road.

Neighbouring localities are Grove, Crabtree, Lower Longley, Lucaston, Collinsvale and Lachlan.

Its major tributary, the Crabtree Rivulet, also rises in the Wellington Range.

[4] Route C617 (Mountain River Road) enters from the south and runs through to the centre, where it ends.