South Johnstone, Queensland
| South Johnstone Queensland  | |||||||||||||||
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South Johnstone Innisfail, circa 1938  | |||||||||||||||
| Coordinates | 17°35′47″S 145°59′46″E / 17.5963°S 145.9961°E | ||||||||||||||
| Population | 456 (2021 census) | ||||||||||||||
| • Density | 114.0/km2 (295/sq mi) | ||||||||||||||
| Postcode(s) | 4859 | ||||||||||||||
| Area | 4.0 km2 (1.5 sq mi) | ||||||||||||||
| Time zone | AEST (UTC+10:00) | ||||||||||||||
| Location | 
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| LGA(s) | Cassowary Coast Region | ||||||||||||||
| State electorate(s) | Hill | ||||||||||||||
| Federal division(s) | Kennedy | ||||||||||||||
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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.