Diamond Creek (Vic.)

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According to evaluations of ABS population updates for the wider region and new address verifications by Districts since the Census, the suburb of Diamond Creek is home to approximately 12,997 residents as of May 2026. This represents a growth of 494 individuals (4.0%) from the 2021 Census, which recorded 12,503 people. The population shift is calculated from a resident base of 12,951, estimated by Districts using the latest ABS ERP release (June 2025) combined with an additional 119 validated new addresses following the Census. The resulting density is 745 persons per square kilometer, matching typical averages found in other Districts analyzed locations. The 4.0% expansion in the suburb of Diamond Creek since the 2021 census outpaced the SA3 region (1.8%), positioning it as a local growth frontrunner. Natural increase was the main contributor, accounting for roughly 62.0% of the population growth in recent times.

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Diamond Creek features a highly educated workforce with strong representation in core service industries, an unemployment rate of only 2.2%, and a 2.2% growth in jobs over the past year, according to statistical data aggregated by Districts. In March 2026, there were 8,002 employed residents, with an unemployment rate 2.5% below the Greater Melbourne rate of 4.8%, and a workforce participation rate that stands well above the norm (78.1% compared to Greater Melbourne's 70.2%). Census statistics show that 31.6% of working residents performed their duties from home, though this figure may be influenced by pandemic-related lockdowns.

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Tax data from the ATO for financial year 2023 aggregated by Districts indicates that income levels in the suburb of Diamond Creek are well above the national benchmark. Taxpayers in the suburb of Diamond Creek recorded a median income of $60,624 and an average income of $76,409, compared to Greater Melbourne averages of $57,688 and $75,164. Adjusting for Wage Price Index growth of 9.62% since financial year 2023, current estimates stand at approximately $66,456 for median income and $83,760 for average income as of March 2026. The 2021 Census placed household, family, and individual incomes in the suburb of Diamond Creek between the 77th and 90th percentiles nationally. Looking at income brackets, 33.2% of the population (4,315 people) earn weekly incomes between and mirroring the regional distribution of . High-income earners are prominent, with earning more than per week, indicating significant local purchasing power. Residents retain of their income after meeting housing costs, and the area is positioned in the th decile of the SEIFA index.

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The housing stock in Diamond Creek at the time of the latest Census consisted of 94.4% separate houses and 5.6% semi-detached properties, apartments, and other dwellings, contrasting with Greater Melbourne where separate houses accounted for 67.9% and alternative dwellings made up 32.1%. Home ownership was high at 36.0%, with the remaining properties occupied by mortgage holders (53.9%) or tenants (10.1%). The median monthly mortgage payment was $2,167 and the median weekly rent was $430, both exceeding Greater Melbourne's medians of $2,000 and $390. Nationally, mortgage repayments are higher than the Australian median of $1,863, and rents are above the national median of $375.

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Family households make up the vast majority of homes at 84.4%, consisting of couples with children at 47.3%, couples without children at 25.7%, and single parents at 10.8%. Non-family households account for the remaining 15.6%, with single-person households representing 14.6% and group share houses comprising 0.9% of the total. The median household occupancy is 2.9 people, exceeding the Greater Melbourne average of 2.6.

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Tertiary educational attainment in Diamond Creek is lower than regional averages, with 29.3% of residents aged 15+ holding a university degree compared to 37.0% across Greater Melbourne, suggesting opportunities for further skill development. Bachelor degrees are the most common higher qualification at 19.6%, followed by postgraduate degrees at 5.7% and graduate diplomas at 4.0%. Vocational training is common, with 36.6% of residents aged 15+ holding trade qualifications, including advanced diplomas (12.5%) and certificates (24.1%).

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Public transport analysis lists 45 active transit stops in Diamond Creek, which are serviced by a combination of buses. These stops accommodate 10 different bus routes, providing 5,034 weekly passenger journeys. Accessibility is favorable, with residents living an average of 266 meters from the nearest stop. Due to the residential nature of the area, most workers commute out of the suburb, with cars remaining the main mode of travel at 92%, and 5% using the train. Household vehicle ownership averages 2.0 cars per dwelling, which is above the regional average. A high 31.6% of residents worked from home according to the 2021 Census, which was likely influenced by pandemic conditions.

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An evaluation of health indicators shows positive outcomes throughout Diamond Creek, according to Districts data on mortality and chronic illness rates, which reveals low rates of common health conditions among both younger and older cohorts, while private health insurance coverage is high at approximately 57% of the population (~7,406 people).

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Diamond Creek exhibits lower cultural diversity compared to broader benchmarks, with 85.0% of the population born in Australia, 94.0% holding citizenship, and 91.1% speaking only English at home. Christianity is the primary religion, followed by 46.8% of residents. The most distinct religious overrepresentation is among followers of Judaism, who make up 0.1% of the population compared to 1.0% across Greater Melbourne.

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The median age of 39 years in Diamond Creek is slightly higher than the Greater Melbourne average of 37 and close to the national average of 38. The 55 - 64 age group is overrepresented locally at 13.6% compared to Greater Melbourne, while young adults aged 25 - 34 are underrepresented at 9.8%. Since the 2021 Census, the proportion of residents aged 75 to 84 has risen from 3.6% to 5.2%. In contrast, the 25 to 34 age bracket declined from 11.2% to 9.8%, and the 45 to 54 group decreased from 15.3% to 14.2%. Projections for point to demographic changes, with the to cohort expected to grow by ( people) to reach from while the number of children aged to is projected to decrease by residents.

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Diamond Creek currently has an estimated 779 children under 5 years old, comprising approximately 448 children aged 0-2 and 297 children aged 3-4. This cohort grew by an estimated 6% since the previous census. though population forecasts indicate future decline, with an anticipated decrease of 2% by 2041 (to approximately 765 children). Meanwhile the 5-12 cohort currently amounts to 1,378. While growth has been positive birth rates observed in the area have been moderate, with approximately 11.7 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area within the middle tier nationally.