Diddillibah - Rosemount

Population growth drivers in Diddillibah - Rosemount are strong compared to national averages based on AreaSearch's ranking of recent, and medium to long-term trends

As of February 2026, Diddillibah - Rosemount's population is approximately 4700, reflecting a growth of 297 people since the 2021 Census which reported a population of 4403. This increase is inferred from the estimated resident population of 4690 in June 2024 and an additional 19 validated new addresses post-Census. The current population density is around 150 persons per square kilometer. Over the past decade, Diddillibah - Rosemount has shown resilient growth with a compound annual growth rate of 2.3%, outperforming the Rest of Qld. Interstate migration contributed approximately 49.7% to recent population gains, although all drivers including overseas migration and natural growth were positive factors. AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area released in 2024 with a base year of 2022.

For areas not covered by this data and years post-2032, Queensland State Government's SA2 area projections released in 2023 based on 2021 data are used, applying proportional growth weightings from ABS Greater Capital Region projections for each age cohort where state projections lack age category splits. Future population trends indicate a median increase just below Australia's non-metropolitan areas, with the area expected to grow by 550 persons to 2041 based on latest annual ERP population numbers, reflecting an overall increase of approximately 11.5% over the 17-year period.

Residential development activity is slightly higher than average within Diddillibah - Rosemount when compared nationally

Diddillibah-Rosemount has received approximately 24 dwelling approvals per year over the past five financial years, totalling 121 homes. In FY-26 so far, 8 approvals have been recorded. On average, 3.9 people moved to the area annually for each dwelling built between FY-21 and FY-25. The average construction cost of new homes was $387,000.

This financial year has seen $3.3 million in commercial approvals. Compared to the rest of Queensland, Diddillibah-Rosemount has about three-quarters the building activity per person and ranks at the 47th percentile nationally, indicating relatively constrained buyer choice. All new construction has been standalone homes, preserving the area's low density nature.

As of FY-25, there were an estimated 370 people in the area per dwelling approval. By 2041, Diddillibah-Rosemount is forecasted to gain 540 residents. If current construction levels continue, housing supply should meet demand adequately, creating favourable conditions for buyers and potentially enabling population growth beyond current forecasts.

Diddillibah - Rosemount has strong levels of nearby infrastructure activity, ranking in the top 40% nationally

Changes to local infrastructure significantly impact an area's performance. AreaSearch identified 19 projects likely affecting the region. Notable ones are Summer Breeze Estate, Good Samaritan Catholic College Expansion, Parklakes Central (Bli Bli Northern Village), and Bruce Highway Upgrade - Maroochydore Road to Mons Road. The following list details those most relevant.

Professional plan users can use the search below to filter and access additional projects.

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Employment performance in Diddillibah - Rosemount exceeds national averages across key labour market indicators

Rosemount, Diddillibah has a skilled workforce with the construction sector being notably prominent. As of September 2025, the unemployment rate is 2.7%. There are 2,314 residents in work, which is 1.4% lower than Rest of Qld's rate of 4.1%.

The workforce participation rate is 61.7%, compared to Rest of Qld's 65.7%. According to Census responses, 18.1% of residents work from home. Leading employment industries include construction, health care & social assistance, and retail trade. Construction shows strong specialization with an employment share of 1.6 times the regional level, while agriculture, forestry & fishing has lower representation at 2.1%.

The area offers limited local employment opportunities as indicated by the count of Census working population versus resident population. In the 12-month period ending September 2025, labour force decreased by 2.5% and employment declined by 1.8%, resulting in a fall of 0.7 percentage points in unemployment rate. Jobs and Skills Australia's national employment forecasts from May-25 suggest that national employment will expand by 6.6% over five years and 13.7% over ten years. Applying these projections to Diddillibah - Rosemount's employment mix indicates local employment should increase by 6.7% over five years and 13.7% over ten years, though this is a simple weighting extrapolation for illustrative purposes and does not consider localised population projections.

Income levels sit below national averages according to AreaSearch assessment

According to AreaSearch's aggregation of the latest postcode level ATO data released on 1 July 2023, Diddillibah - Rosemount SA2 had a median income among taxpayers of $50,424 with an average level standing at $63,449. This is below the national average and compares to levels of $53,146 and $66,593 across Rest of Qld respectively. Based on Wage Price Index growth of 9.91% since financial year 2023, current estimates would be approximately $55,421 (median) and $69,737 (average) as of September 2025. According to the Australian Bureau of Statistics Census figures released on 28 June 2021, household, family and personal incomes in Diddillibah - Rosemount all rank modestly, between the 29th and 41st percentiles. Income analysis reveals that the largest segment comprises 26.6% earning $1,500 - $2,999 weekly (1,250 residents), reflecting patterns seen in the broader area where 31.7% similarly occupy this range. Housing affordability pressures are severe, with only 83.5% of income remaining after housing costs, ranking at the 41st percentile. The area's SEIFA income ranking places it in the 6th decile.

Diddillibah - Rosemount is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

Dwelling structure in Diddillibah - Rosemount, as evaluated at the latest Census (2016), comprised 87.8% houses and 12.1% other dwellings. In comparison, Non-Metro Qld had 76.4% houses and 23.6% other dwellings. Home ownership in Diddillibah - Rosemount was 45.2%, with mortgaged dwellings at 43.3% and rented dwellings at 11.5%. The median monthly mortgage repayment was $2,167, higher than Non-Metro Qld's average of $1,655. The median weekly rent figure was $400, compared to Non-Metro Qld's $345. Nationally, Diddillibah - Rosemount's mortgage repayments were significantly higher than the Australian average of $1,863, while rents exceeded the national figure of $375.

Diddillibah - Rosemount has a typical household mix, with a higher-than-average median household size

Family households account for 74.4% of all households, including 35.1% couples with children, 31.0% couples without children, and 7.9% single parent families. Non-family households constitute the remaining 25.6%, with lone person households at 23.5% and group households comprising 2.1%. The median household size is 2.7 people, larger than the Rest of Qld average of 2.5.

Diddillibah - Rosemount shows strong educational performance, ranking in the upper quartile nationally when assessed across multiple qualification and achievement indicators

Educational qualifications in Diddillibah-Rosemount trail regional benchmarks with 23.0% of residents aged 15+ holding university degrees compared to the Australian average of 30.4%. Bachelor degrees are most common at 15.9%, followed by postgraduate qualifications (4.2%) and graduate diplomas (2.9%). Trade and technical skills are prominent, with 41.0% of residents aged 15+ holding vocational credentials – advanced diplomas (12.5%) and certificates (28.5%). Educational participation is high, with 27.5% of residents currently enrolled in formal education, including 9.8% in primary, 9.3% in secondary, and 3.8% pursuing tertiary education.

Educational participation is notably high, with 27.5% of residents currently enrolled in formal education. This includes 9.8% in primary education, 9.3% in secondary education, and 3.8% pursuing tertiary education.

Transport servicing is low compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Public transport analysis shows seven active transport stops operating within Diddillibah - Rosemount. These stops are served by two individual bus routes, collectively providing 299 weekly passenger trips. Transport accessibility is rated as limited, with residents typically located 1864 meters from the nearest stop. The area is primarily residential, and most residents commute outward. Car remains the dominant mode of transport at 95%. Vehicle ownership averages 1.8 per dwelling, which is above the regional average.

According to the 2021 Census, some 18.1% of residents work from home, a figure that may reflect COVID-19 conditions. Service frequency averages 42 trips per day across all routes, equating to approximately 42 weekly trips per individual stop.

The level of general health in Diddillibah - Rosemount is notably higher than the national average with prevalence of common health conditions low among the general population and nearer the nation's average across older, at risk cohorts

Rosemount, Diddillibah demonstrates better-than-average health outcomes according to AreaSearch's analysis of mortality rates and chronic condition prevalence. The prevalence of common health conditions is low among the general population but nears the national average for older, at-risk cohorts.

Approximately 50% (~2,373 people) of the total population has private health cover, lower than the national average of 55.7%. The most prevalent medical conditions are arthritis (10.0%) and asthma (7.9%), while 66.6% claim to be completely free from medical ailments, slightly lower than the Rest of Qld's 67.6%. Health outcomes among working-age residents are generally typical. The area has a higher proportion of seniors aged 65 and over at 23.0% (1,083 people), compared to Rest of Qld's 20.4%. Health outcomes among seniors in Rosemount are above average but rank lower nationally than the broader population.

Diddillibah - Rosemount ranks below the Australian average when compared to other local markets across a number of language and cultural background related metrics

Diddilbah-Rosemount was found to have a cultural diversity below average, with 80.9% of its population born in Australia, 90.3% being citizens, and 95.0% speaking English only at home. Christianity was the main religion, comprising 49.4% of people in Diddilbah-Rosemount. The most significant overrepresentation was seen in the 'Other' category, with 1.1% compared to 0.8% regionally.

In terms of ancestry, the top three groups were English (33.8%), Australian (26.8%), and Scottish (9.1%). Notably, German (5.1%) was overrepresented compared to the regional average of 4.7%. Similarly, New Zealand (1.0%) and South African (0.6%) were also slightly overrepresented in Diddilbah-Rosemount compared to their respective regional averages of 0.9% and 0.5%.

Diddillibah - Rosemount hosts an older demographic, ranking in the top quartile nationwide

Diddillibah - Rosemount has a median age of 45, which is higher than both the Rest of Qld figure of 41 and the national average of 38. The age profile shows that those aged 75-84 years make up 8.5%, while those aged 25-34 years comprise 8.4%. Between the 2021 Census and now, the median age has decreased from 46 to 45, indicating a shift towards a younger demographic. The 15 to 24 age group has grown from 10.4% to 12.6%, while the 75 to 84 cohort increased from 7.5% to 8.5%. Conversely, the 45 to 54 age group declined from 14.8% to 12.6%, and the 65 to 74 group dropped from 13.6% to 11.9%. By 2041, demographic modeling suggests Diddillibah - Rosemount's age profile will change significantly. The 25 to 34 cohort is projected to grow by 41%, adding 162 residents to reach 557. However, the 55 to 64 and 15 to 24 cohorts are expected to experience population declines.