Serpentine-Jarrahdale
40,531 residents (ABS estimated resident population, 30 June 2025) across 901 km², 13 suburbs. Council website: sjshire.wa.gov.au.
Council series run to Aug 2026.
Population
40,531
ABS estimated resident population, 30 June 2025 · +4.5% in a year
Density
45/km²
901 km² · ERP 2025 over the ABS 2024 boundary
Council-wide house median
$670k
Established-house transfers across the whole council, FY 2023-24 (ABS)
Federal grants per resident
$94
Financial Assistance Grant 2025-26 over ERP 2025
Dwelling approvals
21.2 per 1,000
Residents, 12 months to Aug 2026 (ABS Building Approvals)
Advantage decile
8 of 10
SEIFA 2021 IRSAD, national (10 = most advantaged)
Suburbs
13
Where it holds most residents (ABS mesh-block allocation)
Trends
Council-level series. Each chart names its source and period.
People and housing
Council-wide figures from the ABS Census of 2021 and SEIFA 2021 (national deciles, 10 = most advantaged).
- Median age
- 33
- Median household income
- $2,097/week
- Median rent
- $380/week
- Median mortgage repayment
- $1,972/month
- Households renting
- 12.6%
- Average household
- 3.0 people
- Advantage and disadvantage (IRSAD)
- decile 8 of 10
- Disadvantage (IRSD)
- decile 9 of 10
Suburbs
13 suburbs where Serpentine-Jarrahdale holds most residents. Population is Census 2021 for the whole suburb. A median here is the suburb’s own Valuer-General median — suburbs without one are blank, never filled with the council figure.
| Suburb | Population | In this council | Median house (VG) | Flood / bushfire | IRSAD |
|---|---|---|---|---|---|
| Byford | 18,878 | All | – / 75% | 5 | |
| Serpentine (WA) | 2,863 | All | – / 99% | 6 | |
| Oakford | 2,803 | All | – / 100% | 9 | |
| Darling Downs | 1,591 | All | – / 99% | 8 | |
| Mundijong | 1,246 | All | – / 99% | 3 | |
| Jarrahdale | 1,205 | All | – / 99% | 7 | |
| Cardup | 1,163 | All | – / 100% | 9 | |
| Whitby | 1,005 | All | – / 98% | 6 | |
| Mardella | 446 | All | – / 100% | 8 | |
| Hopeland (WA) | 313 | All | – / 99% | 6 | |
| Oldbury | 296 | All | – / 100% | 6 | |
| Keysbrook | 265 | 75% | – / 94% | 7 | |
| Karrakup | 172 | All | – / 98% | 8 |
Hazards
Share of each member suburb's land inside the mapped layer, averaged across the council weighted by the residents each suburb contributes. Only suburbs a source covers count; the rest are left out, not counted as zero.
Representation
Federal electorates and state districts covering the council, by share of the residents its suburbs contribute (each suburb counts once, for the seat containing a representative interior point).
Federal electorates
- Burt · Matt KEOGH (ALP)72%
- Canning · Andrew HASTIE (LP)28%
State districts
- Darling Range · Hugh Jones (ALP)91%
- Oakford · Yaz Mubarakai (ALP)9%
Asking-price cuts
Cuts in the last 30 days to listings the Shorted crawl has seen in the last 14 days, across 1 suburb of this council. An aggregate only: published at 3 or more cut listings council-wide (cuts in every crawled suburb count), and a suburb is named only when it has 3 of its own. Computed 8 Nov 2026; newest crawl observation 2 Nov 2026.
- Listings cut
- 24
- of 142 tracked
- Share cut
- 16.9%
- Typical cut
- 4.0%
- median over every cut listing
Most cuts: Byford (24). All price drops →
Neighbouring councils
Councils in the same state whose suburbs share a boundary with this one's, and councils it splits a suburb with.
Compare it with every Western Australia council on the council map or the Western Australia council list.
Boundaries: ABS ASGS Edition 3, LGA 2024 boundaries; suburbs allocated by 2021 mesh block, weighted by Census 2021 residents. Population: ABS estimated resident population 2025. Census 2021 and SEIFA 2021: ABS. Council-wide medians: ABS Data by Region. Approvals: ABS Building Approvals. Grants: Financial Assistance Grants, Dept of Infrastructure. Flood and bushfire: state planning layers. Observed water: Geoscience Australia DEA Water Observations. Asking-price cuts: Shorted listing crawl, aggregates only. Website and identity: Wikidata (CC0). ABS, Dept of Infrastructure and state government data CC BY 4.0. Council facts loaded 2026-11-05.