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

Based on AreaSearch's analysis, Diddillibah - Rosemount's population is around 4,700 as of Feb 2026. This reflects an increase of 297 people (6.7%) since the 2021 Census, which reported a population of 4,403 people. The change is inferred from the estimated resident population of 4,690 from the ABS as of June 2024 and an additional 19 validated new addresses since the Census date. This population level equates to a density ratio of 150 persons per square kilometer, providing significant space per person and potential room for further development. Over the past decade, Diddillibah - Rosemount has demonstrated resilient growth patterns with a 2.3% compound annual growth rate, outpacing the Rest of Qld. Population growth for the area was primarily driven by interstate migration, which contributed approximately 49.7% of overall population gains during recent periods, although all drivers, including overseas migration and natural growth, were positive factors.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with 2022 as the base year. For any SA2 areas not covered by this data, and for years post-2032, Queensland State Government's SA2 area projections, released in 2023 and based on 2021 data, are adopted. It should be noted that these state projections do not provide age category splits; hence, where utilised, AreaSearch is applying proportional growth weightings in line with the ABS Greater Capital Region projections (released in 2023, based on 2022 data) for each age cohort. As we examine future population trends, a population increase just below the median of Australia's non-metropolitan areas is expected, with the area expected to increase by 550 persons to 2041 based on the latest annual ERP population numbers, reflecting an increase of 11.5% in total over the 17 years.

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

Diddillibah - Rosemount has experienced around 24 dwellings receiving development approval per year, totalling 121 homes over the past 5 financial years. So far in FY-26, 8 approvals have been recorded. With an average of 3.9 people per year moving to the area for each dwelling built over the past 5 financial years (between FY-21 and FY-25), supply is substantially lagging demand, which generally means heightened buyer competition, leading to pricing pressures, while new homes are being built at an average value of $387,000. There have also been $3.3 million in commercial approvals this financial year, indicating limited commercial development focus.

Compared to the rest of Queensland, Diddillibah - Rosemount records about three-quarters of the building activity per person and ranks in the 47th percentile of areas assessed nationally, resulting in relatively constrained buyer choice and supporting interest in existing homes. Further, new construction has consisted entirely of standalone homes, preserving the area's low-density nature with an emphasis on detached housing that attracts space-seeking buyers. The estimated count of 370 people in the area per dwelling approval reflects its quiet, low-activity development environment.

Population forecasts indicate Diddillibah - Rosemount will gain 540 residents through to 2041 (from the latest AreaSearch quarterly estimate). With current construction levels, housing supply should adequately meet demand, creating favourable conditions for buyers while potentially enabling growth that exceeds current forecasts.

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

Nothing can influence an area's performance as much as changes to local infrastructure, major projects, and planning initiatives. In total 19 projects have been identified by AreaSearch that are likely to have an impact on the area. Key projects include Summer Breeze Estate, Good Samaritan Catholic College Expansion, Parklakes Central (Bli Bli Northern Village), and Bruce Highway Upgrade - Maroochydore Road to Mons Road, with the list below detailing those likely to be of most relevance.

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

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

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

Diddillibah - Rosemount possesses a skilled workforce, with the construction sector a particular standout in terms of representation, and an unemployment rate of just 2.9%. As of December 2025, 2,284 residents are in work while the unemployment rate is 1.1% below Regional Qld's rate of 4.0%, and workforce participation is somewhat below standard (61.0% compared to Regional Qld's 65.4%). Based on Census responses, a moderate 18.1% of residents were found to work from home, though Covid-19 lockdown impacts should be considered.

Leading employment industries among residents comprise construction, health care & social assistance, and retail trade. The area shows particularly strong specialization in construction, with an employment share of 1.6 times the regional level. Conversely, agriculture, forestry & fishing shows lower representation at 2.1% versus the regional average of 4.5%. The predominantly residential area appears to offer limited employment opportunities locally, as indicated by the count of Census working population vs resident population.

Based on AreaSearch analysis of SALM and ABS data, the 12-month period saw the labour force decrease by 3.2% alongside a 3.1% employment decline, with unemployment remaining essentially unchanged. This contrasts with Regional Qld, where employment rose by 0.7%, the labour force grew by 1.0%, and unemployment rose 0.3 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 can offer further insight into potential future demand within Diddillibah - Rosemount. These projections, covering five and ten-year periods, have been mapped against the local employment profile to estimate growth patterns. While national employment is forecast to expand by 6.6% over five years and 13.7% over ten years, growth rates differ significantly between industry sectors. Applying these industry-specific projections to Diddillibah - Rosemount's employment mix suggests local employment should increase by 6.7% over five years and 13.7% over ten years (please note this is a simple weighting extrapolation for illustrative purposes and does not take into account 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 for FY-23, the Diddillibah - Rosemount SA2 had a median income among taxpayers of $50,424 with the average level standing at $63,449. This is below the national average and compares to levels of $53,146 and $66,593 across Regional Qld respectively. Based on Wage Price Index growth of 9.91% since FY-23, current estimates would be approximately $55,421 (median) and $69,737 (average) as of September 2025. According to 2021 Census figures, household, family and personal incomes all rank modestly in Diddillibah - Rosemount, between the 29th and 41st percentiles. Income analysis reveals 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, ranking at the 41st percentile and 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 within Diddillibah - Rosemount, as evaluated at the latest Census, comprised 87.8% houses and 12.1% other dwellings (semi-detached, apartments, 'other' dwellings), in comparison to Regional Qld's 76.4% houses and 23.6% other dwellings. Meanwhile, the level of home ownership within Diddillibah - Rosemount was well beyond that of Regional Qld, at 45.2%, with the remainder of dwellings either mortgaged (43.3%) or rented (11.5%). The median monthly mortgage repayment in the area was well above the Regional Qld average at $2,167, while the median weekly rent figure was recorded at $400, compared to Regional Qld's $1,655 and $345. Nationally, Diddillibah - Rosemount's mortgage repayments are significantly higher than the Australian average of $1,863, while rents are exceeding the national figure of $375.

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

Family households dominate at 74.4% of all households, comprising 35.1% couples with children, 31.0% couples without children, and 7.9% single parent families. Non-family households make up the remaining 25.6%, with lone person households at 23.5% and group households comprising 2.1% of the total. The median household size of 2.7 people is larger than the Regional 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 30.4% in Australia. This gap highlights potential for educational development and skills enhancement. Bachelor degrees lead at 15.9%, followed by postgraduate qualifications (4.2%) and graduate diplomas (2.9%). Trade and technical skills feature prominently, with 41.0% of residents aged 15+ holding vocational credentials, including advanced diplomas (12.5%) and certificates (28.5%).

Educational participation is notably high, with 27.5% of residents aged 15+ 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 reveals 7 active transport stops operating within Diddillibah - Rosemount, comprising a mix of buses. These stops are serviced by 2 individual routes, collectively providing 299 weekly passenger trips. Transport accessibility is rated as limited, with residents typically located 1864 meters from the nearest transport stop. As a primarily residential area, most residents commute outward; the car remains the dominant mode at 95%. Vehicle ownership averages 1.8 per dwelling, which is above the regional average. Some 18.1% of residents work from home (2021 Census; 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

Diddillibah - Rosemount demonstrates above-average health outcomes, based on AreaSearch's assessment of mortality rates and chronic condition prevalence. The prevalence of common health conditions is low among the general population and closer to the national average across older, at-risk cohorts. The rate of private health cover is relatively low at approximately 50% of the total population (~2,373 people), compared to the national average of 55.7%.

The most common medical conditions in the area are arthritis and asthma, impacting 10.0% and 7.9% of residents, respectively, while 66.6% declared themselves as completely clear of medical ailments compared to 67.6% across Regional Qld. Health outcomes among the working-age population are broadly typical. The area has 23.0% of residents aged 65 and over (1,083 people), which is higher than the 20.4% in Regional Qld. Health outcomes among seniors are above average, though they 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

Diddillibah - Rosemount was found to be below average in terms of cultural diversity, with 80.9% of its population born in Australia, 90.3% being citizens, and 95.0% speaking English only at home. The main religion in Diddillibah - Rosemount is Christianity, which makes up 49.4% of people. However, the most apparent overrepresentation was in Other, which comprises 1.1% of the population, compared to 0.8% across Regional Qld.

In terms of ancestry (country of birth of parents), the top three represented groups in Diddillibah - Rosemount are English, comprising 33.8% of the population, Australian, comprising 26.8% of the population, and Scottish, comprising 9.1% of the population. Additionally, there are notable divergences in the representation of certain other ethnic groups: German is notably overrepresented at 5.1% of Diddillibah - Rosemount (vs 4.7% regionally), New Zealand at 1.0% (vs 0.9%) and South Australian at 0.6% (vs 0.5%).

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

With a median age of 45, Diddillibah - Rosemount is materially older than the Regional Qld figure of 41 and also well above the 38-year national average. The age profile shows 75 - 84 year-olds are particularly prominent (8.5%), while the 25 - 34 group is comparatively smaller (8.4%) than in Regional Qld. Since the 2021 Census, the median age has decreased by 1.0 years from 46 to 45, indicating a younger demographic shift. Key changes show the 15 to 24 age group has grown from 10.4% to 12.6% of the population, while the 75 to 84 cohort increased from 7.5% to 8.5%. Conversely, the 45 to 54 cohort has declined from 14.8% to 12.6% and the 65 to 74 group dropped from 13.6% to 11.9%. Demographic modeling suggests Diddillibah - Rosemount's age profile will evolve significantly by 2041. The 25 to 34 cohort shows the strongest projected growth at 41%, adding 162 residents to reach 557. In contrast, the 55 to 64 and 15 to 24 cohorts are expected to experience population declines.