Diddillibah - Rosemount
Statistical Area - sa2

Diddillibah - Rosemount lies within the top quartile of areas nationally for population growth performance according to AreaSearch analysis of recent, and medium to long-term trends

Diddillibah - Rosemount's population is approximately 4,685 as of November 2025. This represents an increase of 282 people since the 2021 Census, which reported a population of 4,403. The growth is inferred from ABS' estimated resident population of 4,690 in June 2024 and additional validated new addresses since the Census date. This results in a density ratio of 149 persons per square kilometer. Over the past decade, Diddillibah - Rosemount has shown resilient growth with a compound annual growth rate of 2.3%, outperforming non-metro areas. Interstate migration contributed approximately 49.7% to population gains recently, although all factors including overseas migration and natural growth were positive.

AreaSearch uses 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 from 2023 based on 2021 data are adopted, applying proportional growth weightings for age cohorts in line with ABS Greater Capital Region projections released in 2023. Future population trends indicate an increase just below the median of Australia's non-metropolitan areas, with a projected increase of 550 persons to 2041 based on latest numbers, reflecting an 11.8% total increase over the 17 years.

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

Rosemount in Diddillibah has received approximately 24 dwelling approvals per year over the past five financial years, totalling 121 homes from FY-20 to FY-25. As of FY-26, seven approvals have been recorded. On average, 3.9 people have moved to the area annually for each dwelling built between FY-21 and FY-25, indicating substantial demand outstripping supply, which can lead to heightened buyer competition and pricing pressures. The average construction cost of new homes is $387,000.

In FY-26, there have been $3.3 million in commercial approvals, suggesting limited focus on commercial development compared to residential. Relative to the rest of Queensland, Diddillibah-Rosemount has about three-quarters the building activity per person and ranks at the 48th percentile nationally, resulting in constrained buyer choice and interest in existing homes. All new construction consists of standalone homes, preserving the area's low-density nature and attracting space-seeking buyers.

There are an estimated 370 people living in the area for each dwelling approval, reflecting its quiet development environment. Population forecasts indicate Diddillibah-Rosemount will gain 555 residents by 2041. With current construction levels, housing supply should meet demand adequately, creating favourable conditions for buyers and potentially enabling growth that exceeds current forecasts.

Diddillibah - Rosemount has moderate levels of nearby infrastructure activity, ranking in the top 50% nationally

Changes to local infrastructure significantly influence an area's performance. AreaSearch identified 19 projects likely impacting the region. Notable initiatives include Summer Breeze Estate, Good Samaritan Catholic College Expansion, Parklakes Central (Bli Bli Northern Village), and Park Rise Estate Stage 2. The following details those most relevant.

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

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Employment conditions in Diddillibah - Rosemount demonstrate strong performance, ranking among the top 35% of areas assessed nationally

Rosemount, in Diddillibah, has a skilled workforce with an unemployment rate of 2.4% as of June 2025. In this period, 2,348 residents are employed, which is 1.6 percentage points below the Rest of Qld's rate of 3.9%.

The workforce participation rate is similar to Rest of Qld's 59.1%. Leading industries for employment among residents include construction, health care & social assistance, and retail trade. Construction shows strong specialization with an employment share 1.6 times the regional level, while agriculture, forestry & fishing has lower representation at 2.1% compared to the regional average of 4.5%. Between June 2024 and June 2025, labour force decreased by 2.1%, employment declined by 0.9%, leading to a fall in unemployment rate by 1.2 percentage points.

In contrast, Rest of Qld saw employment rise by 1.8% and labour force grow by 2.0%, with unemployment rising by 0.2 percentage points. Jobs and Skills Australia's national employment forecasts from May 2025 project a 6.6% increase over five years and 13.7% over ten years for national employment. Applying these projections to Diddillibah - Rosemount's employment mix suggests local growth of approximately 6.7% over five years and 13.7% over ten years.

The area's income profile falls below national averages based on AreaSearch analysis

According to AreaSearch's aggregation of the latest postcode level ATO data released for financial year 2022, Diddillibah - Rosemount had a median income among taxpayers of $48,597. The average income stood at $60,976. This is below the national average and compares to levels of $50,780 and $64,844 across Rest of Qld respectively. Based on Wage Price Index growth of 13.99% since financial year 2022, current estimates would be approximately $55,396 (median) and $69,507 (average) as of September 2025. According to 2021 Census figures, household, family and personal incomes all rank modestly in Diddillibah - Rosemount, between the 30th and 41st percentiles. Income analysis reveals the largest segment comprises 26.6% earning $1,500 - 2,999 weekly (1,246 residents). This pattern is also seen in the broader area where 31.7% similarly occupy this income 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 held on 28 August 2016, comprised 87.8% houses and 12.1% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Non-Metro Qld's 82.9% houses and 17.0% other dwellings. Home ownership in Diddillibah - Rosemount stood at 45.2%, with mortgaged dwellings at 43.3% and rented ones at 11.5%. The median monthly mortgage repayment was $2,167, exceeding Non-Metro Qld's average of $1,777. Median weekly rent in the area was $400, compared to Non-Metro Qld's $385. 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 constitute 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 comprise the remaining 25.6%, with lone person households at 23.5% and group households making up 2.1%. The median household size is 2.7 people, larger than the Rest of Qld average of 2.6.

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

In Diddillibah-Rosemount as of 2021, 23.0% of residents aged 15+ have 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%). Vocational credentials are also prevalent, with 41.0% of residents holding such qualifications - advanced diplomas at 12.5% and certificates at 28.5%. Current educational participation is high at 27.5%, including 9.8% in primary, 9.3% in secondary, and 3.8% in tertiary education.

Montessori International College serves the area with an enrollment of 272 students as of 2021. The ICSEA score for the region is 1104, indicating significant socio-educational advantages and academic achievement. All one school offers integrated K-12 education. However, local school capacity is limited at 5.8 places per 100 residents compared to the regional average of 19.8, leading many families to travel for schooling.

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

Transport analysis indicates seven active stops operating within Diddillibah - Rosemount, served by buses only. These stops are covered by two routes, offering 331 weekly passenger trips in total. Residents have limited transport access, living on average 1864 meters from the nearest stop.

Services run approximately 47 times daily across all routes, equating to around 47 weekly trips per individual stop.

Health performance in Diddillibah - Rosemount is lower than average with common health conditions somewhat prevalent across both younger and older age cohorts

Rosemount faces significant health challenges with common health conditions prevalent across both younger and older age cohorts. Approximately 50% of Rosemount's total population (~2,342 people) has private health cover, lower than the national average of 55.3%.

The most common medical conditions are arthritis (10.0%) and asthma (7.9%). Sixty-six point six percent of residents declare themselves completely clear of medical ailments, similar to the Rest of Qld's 66.0%. Rosemount has a higher proportion of seniors aged 65 and over at 23.0% (1,075 people), compared to Rest of Qld's 18.7%. Health outcomes among seniors in Rosemount are above average, performing better than the general population in health metrics.

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's cultural diversity was 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 predominant religion, comprising 49.4% of the population. The most notable overrepresentation was in the 'Other' category, which made up 1.1% compared to the regional average of 0.5%.

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 5.1%, as were New Zealanders (1.0% vs 1.0%) and South Africans (0.6% vs 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 the Rest of Qld figure of 41 and also above the national average of 38. The age profile shows that those aged 75-84 are particularly prominent, making up 8.2% of the population, while those aged 25-34 are comparatively smaller at 8.0%. According to the 2021 Census, the 15 to 24 age group has grown from 10.4% to 12.4%, while the 45 to 54 cohort has declined from 14.8% to 13.0% and the 65 to 74 group has dropped from 13.6% to 12.2%. Looking ahead, demographic projections for Diddillibah - Rosemount indicate significant shifts by 2041. The 25 to 34 age group is projected to grow by 49%, adding 182 people and reaching 557 from 374. Conversely, population declines are projected for the 55 to 64 and 15 to 24 cohorts.