From south to north Tumoulin is a flat valley with Diddleluma Creek flowing through it, elevation approx 950 metres (3,120 ft) above sea level. However, it is more mountainous in both the east and west, rising to approx 1,100 metres (3,600 ft).[4]
The town lies slightly to the east of centre of the locality. The eastern part of the locality is mostly protected areas including Tumoulin Forest Reserve and Tumoulin State Forest. There is also an area in the south of the locality within the Ravenshoe State Forest No 3 which extends into Ravenshoe.[4]
The land use is cropping on the valley floor, grazing on the lower slopes, and forestry in the more mountainous areas.[4]
On 3 August 1911 the Queensland Government auctioned 59 town allotments in the new town of Tumoulin.[8] The township of Tumoulin appears on a 1916 survey plan.[2]
In the 2016 census, the locality of Tumoulin had a population of 109 people.[13]
In the 2021 census, the locality of Tumoulin had a population of 135 people.[1]
Education
There are no schools in Tumoulin. The nearest primary and secondary school is Ravenshoe State School (Prep-12) in neighbouring Ravenshoe to the south-east.[4]
^"Advertising". Cairns Post. Vol. XXV, no. 1061. Queensland, Australia. 15 July 1911. p. 4. Retrieved 5 October 2020 – via National Library of Australia.
^"NEW SCHOOLS". Cairns Post. Vol. XXVII, no. 1877. Queensland, Australia. 20 April 1914. p. 4. Retrieved 5 October 2020 – via National Library of Australia.