South Johnstone is a rural town and locality in the Cassowary Coast Region, Queensland, Australia. In the 2021 census, the locality of South Johnstone had a population of 456 people. South Johnstone is in Far North Queensland, approximately 10 kilometres south-west of Innisfail.
Population: 456 (2021 census)
Postcode(s): 4859
Area: 4.0 km² (1.5 sq mi)
Location: 10.5 km (7 mi) SSW of Innisfail · 96.7 km (60 mi) S of Cairns · 253 km (157 mi) NNW of Townsville · 1,605 km (997 mi) NNW of Brisbane