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 was around 4,692 as of August 2025, according to AreaSearch's analysis. This figure represents an increase of 289 people since the 2021 Census, which reported a population of 4,403. The growth is inferred from ABS data showing an estimated resident population of 4,690 in June 2024 and additional validated new addresses since then. This results in a density ratio of 149 persons per square kilometer. Over the past decade, Diddillibah - Rosemount had a compound annual growth rate of 2.3%, outperforming non-metro areas. Interstate migration contributed approximately 49.7% to recent population gains.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area released in 2024 with a base year of 2022, and Queensland State Government's SA2 area projections released in 2023 based on 2021 data for areas not covered by the former or years post-2032. Future population trends suggest an increase just below Australia's non-metropolitan median, with the area expected to grow by 550 persons to 2041, reflecting a total increase of 11.7% over 17 years.

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

Diddillibah - Rosemount has received approximately 24 dwelling approvals per year. The Australian Bureau of Statistics records development approvals on a financial year basis, totalling 121 across the past five years from FY2021 to FY2025, with one approval so far in FY2026. On average, 3.9 new residents have arrived per dwelling constructed over these five years. This outpaces supply, potentially influencing property prices and buyer competition, given an average construction value of $540,000 for new dwellings.

In the current financial year, $3.3 million in commercial development approvals have been recorded, reflecting the area's predominantly residential nature. Compared to the rest of Queensland, Diddillibah - Rosemount experiences about three-quarters the building activity per person and ranks at the 48th percentile nationally, indicating relatively limited buyer choice favouring existing homes. All new construction has consisted of standalone homes, maintaining the area's low-density character and attracting space-seeking buyers, with an estimated 370 people per dwelling approval.

By 2041, population forecasts predict a gain of 548 residents. With current construction levels, housing supply is expected to meet demand adequately, creating favourable conditions for buyers while potentially facilitating growth beyond current projections.

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

Changes in local infrastructure significantly affect an area's performance. AreaSearch has identified 18 projects likely to impact 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 list details those most relevant.

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

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

Rosemount, in Diddillibah, has a skilled labour force with the construction sector being prominent. As of June 2025, its unemployment rate is 2.4%.

In comparison to Rest of Qld's rate of 3.9%, Rosemount's is 1.6% lower, while workforce participation is similar at 59.1%. Key employment industries include construction, health care & social assistance, and retail trade. Construction stands out with an employment share 1.6 times the regional level, while agriculture, forestry & fishing shows lower representation at 2.1% compared to the regional average of 4.5%. Between Jun-24 and Jun-25, Rosemount's labour force decreased by 2.1%, employment fell by 0.9%, leading to a 1.2 percentage point drop in unemployment rate.

In contrast, Rest of Qld saw employment rise by 1.8% and labour force grow by 2.0%. State-level data from Sep-25 shows Queensland's employment contracted by 0.23%, with an unemployment rate of 4.2%, compared to the national rate of 4.5%. Job forecasts suggest national employment growth of 6.6% over five years and 13.7% over ten years, but localised projections for Rosemount may vary based on its specific industry mix.

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

In financial year 2022, Diddillibah - Rosemount had a median taxpayer income of $48,597 and an average income of $60,976. These figures are below the national averages of $50,780 and $64,844 respectively for Rest of Qld. By March 2025, adjusting for Wage Price Index growth of 11.71%, estimated median income is approximately $54,288 and average income is $68,116. According to the 2021 Census, household, family, and personal incomes in Diddillibah - Rosemount rank modestly, between the 30th and 41st percentiles. Income analysis shows that the largest segment comprises 26.6% of residents earning $1,500 to $2,999 weekly (1,248 residents), similar to the broader area's pattern where 31.7% fall within 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 per the latest Census, comprised 87.8% houses and 12.1% other dwellings. In comparison, Non-Metro Qld had 82.9% houses and 17.0% other dwellings. Home ownership in Diddillibah - Rosemount was 45.2%, with the rest being mortgaged (43.3%) or rented (11.5%). The median monthly mortgage repayment in the area was $2,167, compared to Non-Metro Qld's average of $1,777. The median weekly rent figure was $400, while Non-Metro Qld's was $385. Nationally, Diddillibah - Rosemount's mortgage repayments were higher at $2,167 compared to the Australian average of $1,863, and rents were also higher at $400 compared to 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 making up 2.1%. The median household size is 2.7 people, which is 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, educational qualifications meet regional benchmarks with 23.0% of residents aged 15+ holding university degrees compared to the Australian average of 30.4%. Bachelor degrees are the most common at 15.9%, followed by postgraduate qualifications (4.2%) and graduate diplomas (2.9%). Vocational credentials are also prominent, with 41.0% of residents aged 15+ holding such qualifications, including advanced diplomas (12.5%) and certificates (28.5%). Educational participation is high, with 27.5% of residents currently enrolled in formal education, comprising 9.8% in primary, 9.3% in secondary, and 3.8% in tertiary education.

Montessori International College operates locally, enrolling 272 students as of the given date. Diddillibah - Rosemount demonstrates socio-educational advantages with an ICSEA score of 1104, indicating high academic achievement. All one school offers integrated K-12 education, providing continuity throughout students' academic journey. However, limited local school capacity (5.8 places per 100 residents vs regional average of 19.8) means many families seek schooling in nearby areas.

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

Transport analysis shows seven active stops operating within Diddillibah - Rosemount. These stops serve a mix of bus routes. Two routes operate collectively providing 331 weekly passenger trips.

Resident accessibility to transport is limited with typical distances from nearest stop being 1864 meters. Service frequency averages 47 trips per day across all routes, equating to approximately 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% (~2,346 people) have 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 declared themselves completely clear of medical ailments, similar to Rest of Qld's 66.0%. Twenty-three point zero percent of residents are aged 65 and over (1,077 people), higher than 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 had a lower than average cultural diversity, with 80.9% of its residents born in Australia, 90.3% being citizens, and 95.0% speaking English only at home. Christianity was the predominant religion, accounting for 49.4% of the population. Notably, the 'Other' religious category comprised 1.1%, higher than the Rest of Qld's average of 0.5%.

In terms of ancestry, the top three groups were English (33.8%), Australian (26.8%), and Scottish (9.1%). Some ethnic groups showed notable variations: German was equally represented at 5.1%, New Zealand was also equally represented at 1.0%, and South African was slightly overrepresented at 0.6%.

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

Diddillibah - Rosemount has a median age of 45, which is higher than Rest of Qld's figure of 41 and also above the national average of 38. The age profile shows that those aged 75-84 are particularly prominent at 8.2%, while the 25-34 group is relatively smaller at 8.0% compared to Rest of Qld. Between the 2021 Census and now, the 15 to 24 age group has grown from 10.4% to 12.4%. Conversely, 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 to 2041, demographic projections indicate significant shifts in Diddillibah - Rosemount's age structure. Notably, the 25 to 34 group is projected to grow by 48%, increasing from 375 to 557 people. Conversely, population declines are forecast for the 55 to 64 and 15 to 24 cohorts.