Marmion
With household income in the 91.3rd percentile nationally and 64.2% of dwellings having 4 or more bedrooms, Marmion reads as a suburb defined by established family wealth on a compact 1.15 square kilometre footprint. SEIFA decile 10 on three of four indexes (IRSD, IRSAD, IER) marks it among the least disadvantaged communities in Australia. The median age of 45 sits 5 years above the national figure, and the senior share grew 9.4 points over the decade, pointing to a settled owner population rather than high turnover. Only 10.7% of residents rent, well below national averages, and 48.8% own outright, reflecting long-term wealth accumulation rather than a market driven by new buyers.
Population
2,390
Median Age
45.0
Household IncomeiMedian weekly household income (ABS Census)
$2,435/wk
DAs (12 months)iDevelopment Applications lodged in the past year
2
Median House
$640K
Estimated from rent (2025)
The estimated median house price of $640,000 is anchored by strong underlying demand from a population with household incomes in the 91.3rd percentile nationally. Separate houses dominate at 83.2% of dwellings, with apartments accounting for just 1.2%, making detached-house supply the clearest entry point. The bedroom profile is skewed large: 64.2% of homes have 4 or more bedrooms and only 9.3% have 2 bedrooms, so buyers seeking smaller stock will find limited choice. Monthly mortgage repayments average $2,600, with a mortgage-to-income ratio of 24.7%, comfortably below the 30% stress threshold, meaning the suburb remains accessible relative to local incomes. Outright owners at 48.8% outnumber mortgage holders at 40.5%, a pattern more typical of long-settled coastal suburbs than growth corridors.
For Buyers
The estimated median house price of $640,000 is anchored by strong underlying demand from a population with household incomes in the 91.3rd percentile nationally. Separate houses dominate at 83.2% of dwellings, with apartments accounting for just 1.2%, making detached-house supply the clearest entry point. The bedroom profile is skewed large: 64.2% of homes have 4 or more bedrooms and only 9.3% have 2 bedrooms, so buyers seeking smaller stock will find limited choice. Monthly mortgage repayments average $2,600, with a mortgage-to-income ratio of 24.7%, comfortably below the 30% stress threshold, meaning the suburb remains accessible relative to local incomes. Outright owners at 48.8% outnumber mortgage holders at 40.5%, a pattern more typical of long-settled coastal suburbs than growth corridors.
For Investors
Marmion presents a low-yield, low-risk profile that suits wealth preservation over income generation. Weekly rent of $495 against a $640,000 median implies a gross yield below 4%, modest compared to higher-turnover Perth suburbs. Only 10.7% of residents rent, which compresses the tenant pool and keeps vacancy risk real: the 7.9% vacancy rate warrants attention before committing. Demand drivers are positive but modest: net overseas migration of 130 per year and net internal migration of 22 support steady inflow, with annual population growth of 0.56%. Rent growth reached 12.9% over the period measured, and affordability is improving, from 55.5% in 2011 to 48.9% in 2021, suggesting room for further capital growth rather than immediate yield expansion.
Development Activity
Total DAs
2
Last 12 Months
2
YoY ChangeiYear-over-year change in DA lodgements
—
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in Marmion iICSEA: school advantage index. 1000 = national avg, higher = more advantaged
Marmion Primary School
K-6 · 375 students
Demographics
Marmion's median age of 45 is 5 years above the national figure, and the demographic direction is firmly aging: the senior share rose 9.4 points while the working-age share fell 7.1 points over the decade. University qualifications reach 45.6%, which is 15.5 percentage points above the national average, consistent with the professional and managerial workforce that dominates locally. Just 21.7% of residents were born overseas, roughly in line with the national figure. Ancestry is strongly Anglo-Celtic, led by English (1,116 residents), Irish (278) and Scottish (252). Average household size of 2.7 is slightly above national, reflecting the prevalence of couple families with children (856 families) versus couples without children (550 families). The volunteering rate of 22.2% points to an engaged, community-oriented resident base.
Age Distribution
Bedrooms
Dwelling Structure
83.2%
Houses
15.7%
Townhouse
1.2%
Apartment
Tenure
Tenure in Marmion is skewed heavily toward ownership: 48.8% own outright and 40.5% carry a mortgage, leaving only 10.7% renting, far below state and national norms. This low renter share reflects decades of stable occupancy rather than high demand from the rental market. The dwelling stock is overwhelmingly detached houses at 83.2%, with semi-detached homes at 15.7% and apartments at just 1.2%. Bedroom counts are large: 64.2% of dwellings have 4 or more bedrooms, which is high even by suburban Perth standards. Weekly rent averages $495 and monthly mortgage repayments average $2,600. Rent-to-income at 20.3% and mortgage-to-income at 24.7% both sit below the 30% stress threshold, indicating the housing market is financially comfortable for current residents despite the $640,000 median price.
Mortgage / mo
$2,600
Rent / wk
$495
HH Size
2.7
Personal Income / wk
$1,014
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
7.9%
Unoccupied
72
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
20.3%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
24.7%
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
27.0%
Couples, no children
2,037
Total families
Economy & Employment
Education leads local employment at 15.7% (139 workers), followed by Healthcare at 14.4% (127) and Professional/Tech at 13.2% (117). Construction accounts for 11.5% and Mining 8.8%, the latter reflecting Perth's broader resource economy funnelling skilled residents into regional and offshore roles. By occupation, Professionals (402) and Managers (215) are the two largest groups, consistent with the suburb's decile 9 IEO score for education and occupation advantage. The unemployment rate of 3.8% is low, with a full-time employment rate of 57% among employed residents. The IRSD decile 10 (no relative disadvantage) and IRSAD decile 10 (maximum advantage) confirm that economic hardship is rare here. Real income grew 4.1% over the decade, modest but positive.
Unemployment
0.9%
Labour Force
6,312
Unemployed
55
Quarterly Trend
Source: SALM Dec-25
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
57.0%
Part-time
39.2%
Participation
61.8%
Employed
1,143
Occupations
Top Industries
University
45.6%
Postgraduate
9.2%
Born Overseas
21.7%
Dwellings
837
Transport to Work
Car dependency is pronounced: 91% of residents drive to work, and only 3.2% use public transport, well below city averages, reflecting the suburb's location on Perth's northern coastal strip. No schools are recorded within the 1.15 square kilometre boundary, so families depend on institutions in neighbouring suburbs. Marmion scores decile 10 on IRSD and IRSAD nationally, placing it in the top tier for low disadvantage and high advantage. Only 3.3% of residents (76 people) need daily assistance, low even by advantaged-suburb standards. Rent stress at 20.3% and mortgage stress at 24.7% are both below the 30% threshold, meaning housing costs leave residents with meaningful spending capacity. At 2,085 residents per square kilometre, the density is moderate, preserving the spacious feel of a large-lot, house-dominant suburb.
Drive
91.0%
Public Transport
3.2%
Walk / Cycle
1.7%
Work from Home
N/A
Population Forecast
+0.56%/yr
(+63 people/yr)
EstablishedMarmion grows slowly and predictably. Annual population growth is 0.56%, adding about 63 residents a year, with medium forecasts projecting the broader area reaching around 11,282 by 2031. Over 10 years, population grew 6.9%, consistent with an established coastal suburb rather than a greenfield growth zone. The primary growth driver is overseas migration at 130 net per year, supplemented by modest internal migration of 22. Turnover is very low: 84% of residents stayed in place over the reference period, a 16% turnover rate that signals long-term commitment. The gentrification score of 15 sits at the not gentrifying stage, appropriate for a suburb already at decile 10 advantage with no further socioeconomic ladder to climb.
Historical + Forecast
Hamilton-Perry + Holt smoothing on ERP 2001-2025
Age Cohort Forecast
Primary Driver
Overseas Migration
Net Overseas / yr
+130
Net Internal / yr
+22
Gentrification Signal
Not gentrifying
Accelerating: -1% → 11%
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How Marmion compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is Marmion a good suburb to live in?
Marmion scores decile 10 on IRSD, IRSAD and IER nationally, the top advantage tier across three of four SEIFA indexes, with household income in the 91.3rd percentile. University qualifications reach 45.6%, which is 15.5 points above national. The main practical consideration is car dependency: 91% of residents drive, and public transport use is just 3.2%.
What is the median house price in Marmion?
The estimated median house price is $640,000, based on 2025 rental data. Weekly rent averages $495 and monthly mortgage repayments average $2,600, giving a mortgage-to-income ratio of 24.7%, below the 30% stress threshold relative to local incomes in the 91.3rd income percentile nationally.
What schools are in Marmion?
No schools are recorded inside the 1.15 square kilometre Marmion boundary in this dataset. Families rely on schools in neighbouring suburbs such as Warwick, Duncraig and Hillarys. Locally, 45.6% of residents hold university qualifications, which is 15.5 percentage points above the national figure.
Is Marmion safe?
Detailed crime statistics are not available for Marmion in this dataset. As an indirect indicator, the suburb scores decile 10 on the IRSD index of relative disadvantage nationally, the top tier, and only 3.3% of its 2,390 residents need daily assistance. Low disadvantage scores are consistently associated with lower crime rates in comparable suburbs.
Is Marmion good for property investment?
The investment profile favours capital growth over yield. Weekly rent of $495 against a $640,000 median gives a gross yield below 4%, and only 10.7% of residents rent. The vacancy rate of 7.9% is a caution. Rent grew 12.9% over the recent period, and affordability improved from 55.5% in 2011 to 48.9% in 2021, supporting longer-term capital growth.
How is Marmion's population changing?
Population grows at 0.56% annually, adding around 63 residents a year. Over 10 years the population rose 6.9%. Overseas migration of 130 net per year is the primary driver. The demographic trajectory is aging: the senior share increased 9.4 points over the decade, while the working-age share fell 7.1 points.
How to read these comparisons
Phrases like "above the national average" reference the unweighted median across Australian suburbs with more than 1,000 residents, not population-weighted national figures. Suburb-level medians are more useful for ranking suburbs against each other; ABS census headlines are population-weighted (so dominated by Sydney and Melbourne) and can read very differently.
Current baseline (refreshed 2026-05-10): median age 40, university-educated 30.1%, born overseas 21.6%, average household size 2.5 people.
Data sources: ABS 2021 Census (demographics, income, tenure), state Valuer-General (house prices), Department of Jobs SALM (unemployment), ACARA (school ICSEA), state Crime Statistics agencies (offences), council DA portals (development applications). Population forecasts use a Hamilton-Perry cohort model calibrated to ABS ERP.
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