Castle Cove (NSW)

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According to assessments of recent ABS regional population adjustments and new addresses validated by Districts since the Census, the suburb of Castle Cove is estimated to have a population of approximately 2,661 as of May 2026. Compared to the 2021 Census, which counted 2,643 residents, this represents an addition of 18 people (0.7%). This shift is calculated from a resident base of 2,656, which Districts projected using the June 2025 ERP release from the ABS and 14 validated new addresses added since the Census date. With this headcount, the suburb of Castle Cove has a population density of 1,137 persons per square kilometer, which matches the typical standards observed in other places reviewed by Districts. The main factor driving local expansion has been overseas migration, representing almost the entire source of growth lately.

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The workforce in Castle Cove is characterized by advanced educational qualifications and a strong presence in the technology sector, alongside a low unemployment rate of 2.5% and estimated job growth of 1.5% over the prior year. In March 2026, there are 1,278 employed citizens, with local joblessness sitting 1.6% lower than the 4.1% rate in Greater Sydney, even though participation in the labor force is low at 59.5% relative to the regional benchmark of 69.1%. Census data indicates that 61.0% of working locals operated from home, which may have been influenced by pandemic-related restrictions.

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According to ATO tax statistics released for financial year 2023, the median taxpayer income in the suburb of Castle Cove is $68,783, and the average is $162,075. These figures are high compared to the Greater Sydney median of $60,817 and average of $83,003. Factoring in Wage Price Index growth of 10.32% since financial year 2023, the estimated figures for March 2026 are $75,881 for the median and $178,801 for the average. In the 2021 Census, local incomes ranked between the 92nd and 99th percentiles nationally. Around 42.3% of residents (1,125 people) fall into the $4000+ income bracket, whereas the $1,500 - 2,999 bracket is the largest regionally at . Furthermore, of households earn weekly incomes over . Disposable income remains high at after housing expenses, and the SEIFA index for income places the area in the th decile.

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At the time of the latest Census, the housing inventory in Castle Cove consisted of 90.6% standalone houses and 9.4% alternative dwellings like townhouses and apartments, differing from the Sydney metro distribution of 55.9% houses and 44.1% other options. Home ownership was high at 52.1%, while 35.9% of properties were mortgaged and 12.0% were occupied by renters. Median monthly mortgage costs stood at $4,000 and median weekly rent was $1,000, compared to regional medians of $2,427 and $470 respectively. Compared to national statistics, the mortgage costs in Castle Cove exceed the Australian average of $1,863, and rents are higher than the national standard of $375.

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Families represent the main household type at 83.5%, consisting of 48.7% couples with children, 26.0% couples without children, and 7.9% single parents. The remaining 16.5% are non-family households, including 15.6% occupied by single occupants and 1.4% group homes. The median occupancy is 2.9 individuals per home, which is larger than the Greater Sydney median of 2.7.

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Academic achievements in Castle Cove are high, as 53.8% of residents aged 15+ hold tertiary degrees, compared to NSW at 32.2% and Australia at 30.4%. This strong academic profile prepares the community for professional opportunities. Specifically, bachelor degrees represent 34.0% of the total, postgraduate degrees make up 15.9%, and graduate diplomas account for 3.9%. Vocational qualifications represent 20.3% of credentials for residents aged 15+, consisting of advanced diplomas at 11.3% and certificates at 9.0%.

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An analysis of public transit shows 31 active stops within Castle Cove offering bus connections. A total of 27 distinct routes service these stops, delivering 2,580 weekly passenger journeys. Accessibility is high, with typical residential distances to the nearest stop measuring 171 meters. Since the area is mostly residential, many workers travel outside the suburb, with private cars being the primary mode at 86% and walking at 4%. Households own an average of 1.7 vehicles, exceeding the regional baseline. A large share of 61.0% of residents work from home, based on 2021 Census data, which may reflect pandemic circumstances.

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Analysis of chronic diseases and mortality statistics indicates favorable health results in Castle Cove, with low rates of standard medical conditions across every age bracket. Furthermore, private medical insurance is held by roughly 91% of residents (2,411 people), which is high compared to Greater Sydney at 59.9% and the national baseline of 55.7%.

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The community exhibits diversity with 38.7% of residents born abroad and 30.5% speaking a language other than English at home. The largest religious affiliation is Christianity, which is practiced by 52.1% of residents. The most distinct variance is in Judaism, which accounts for 2.3% of the local population compared to 0.8% across the Greater Sydney region.

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The median age of 46 years in Castle Cove is higher than the Greater Sydney average of 37 and exceeds the national median of 38. The 75 - 84 age cohort is larger locally at 10.2% compared to Greater Sydney, while 25 - 34 year-olds are smaller at 5.4%. Since the 2021 Census, residents aged 75 to 84 increased from 8.1% to 10.2% of the population. In contrast, the 5 to 14 cohort decreased from 16.4% to 14.0% and the 35 to 44 age range fell from 11.1% to 9.9%. Projections for 2041 show significant demographic changes, with the + cohort expected to rise by people (), growing from to . This aging trend is prominent, with citizens aged + accounting for of the forecast growth, whereas the to and to age brackets are expected to experience decreases.

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Castle Cove currently has an estimated 74 children under 5 years old, comprising approximately 46 children aged 0-2 and 30 children aged 3-4. This cohort declined by an estimated 17% since the previous census. while population forecasts indicate future decline, with an anticipated decrease of 12% by 2041 (to approximately 65 children). Meanwhile the 5-12 cohort currently amounts to 290. Birth rates in the area have averaged 4.4 per 1,000 residents over the latest two-year period, a low rate (among the bottom 20% of areas assessed nationally). This rate has slowed down slightly in recent years however.