The size of Johanna is approximately 37.4 square kilometres. It has 3 parks covering nearly 11.4% of total area. The population of Johanna in 2016 was 63 people. By 2021 the population was 85 showing a population growth of 34.9% in the area during that time. The predominant age group in Johanna is 60-69 years. Households in Johanna are primarily childless couples and are likely to be repaying $800 - $999 per month on mortgage repayments. In general, people in Johanna work in a managers occupation.In 2021, 74.40% of the homes in Johanna were owner-occupied compared with 89.60% in 2016.
Johanna has 126 properties. Over the last 5 years, Houses in Johanna have seen a 16.05% increase in median value. As at 31 January 2026:
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