Undullah, Queensland
| Undullah Queensland | |||||||||||||||
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| Undullah Road, 2023 | |||||||||||||||
| Coordinates | 27°49′55″S 152°51′07″E / 27.832°S 152.852°E | ||||||||||||||
| Population | 24 (2021 census) | ||||||||||||||
| • Density | 0.257/km2 (0.666/sq mi) | ||||||||||||||
| Postcode(s) | 4285 | ||||||||||||||
| Area | 93.3 km2 (36.0 sq mi) | ||||||||||||||
| Time zone | AEST (UTC+10:00) | ||||||||||||||
| Location | 
 | ||||||||||||||
| LGA(s) | |||||||||||||||
| State electorate(s) | |||||||||||||||
| Federal division(s) | Wright | ||||||||||||||
| 
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Undullah is a rural locality split between the City of Logan and the Scenic Rim Region, Queensland, Australia. In the 2021 census, Undullah had a population of 24 people.