It is located about 25 kilometres (16 mi) south-east of the town of Oatlands.
The 2021 census determined a population of 212 for the state suburb of Tunnack.
[2] The Coal River forms much of the northern and western boundaries.
Route C342 (Eldon Road) starts at an intersection with C312 and runs south-west until it exits.
This Southern Midlands geography article is a stub.