Teviot Brook flows through the north of Allandale. Some of the land is used for agricultural purposes. The southeast portion is hilly, undeveloped and mostly cleared of natural vegetation. This catchment area is separate from the Teviot Brook watershed, with run-off flowing in to Allan Creek, a tributary of the Logan River to the east.[citation needed]
In the 2016 census, Allandale had a population of 56 people. The locality contained 33 households, in which 60.0% of the population are males and 40.0% of the population are females with a median age of 53, 15 years above the national average. The average weekly household income is $850, $588 below the national average.[6]
In the 2021 census, Allandale had a population of 69 people.[1]
Education
There are no schools in Allandale. The nearest government primary schools are Boonah State School in neighbouring Boonah to the north-west and Beaudesert State School in Beaudesert to the east. The nearest government secondary school is Boonah State High School, also in Boonah.[7]