The Coomera River enters the locality from the south (Illinbah) and flows through the locality exiting to the north-east (Witheren).[3] The locality is the valley created by the river.[4]
Upper Coomera Road enters the locality from the north-east (Witheren) and exits to the south-east (Flying Fox).[4]
The land use is irrigated pastures for grazing near the river with grazing on native vegetation on the slopes of the valley. There are some small areas of rural residential housing.[4]
In the 2016 census, Ferny Glen had a population of 84 people. The locality contains 40 households, in which 42.7% of the population are males and 57.3% of the population are females with a median age of 53, 15 years above the national average. The average weekly household income is $1,312, $126 below the national average.[9]
In the 2021 census, Ferny Glen had a population of 91 people.[1]