Iona, VIC 3815
Cardinia Shire CouncilAll suburbs in postcode 3815
Updated
Median house price
Verified median pending
We don't yet have a verified suburb-level median for this market. We're working on a data partner; in the meantime, treat the state-level figures as a guide only. How we source data.
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What to know about Iona
Iona (3815) sits in the Cardinia region of Victoria.
Iona has roughly 240 residents, with an established, older skew. Households are predominantly owner-occupied.
What it’s like to live here
Summer days here average around 26°C (mild), winter mornings around 6°C (cool). Annual rainfall lands at about 861 mm. Figures are our 1991 to 2020 averages of SILO data for this location (Queensland Government, built from Bureau of Meteorology observations).
Schooling within or near the suburb covers 4 government primary, 1 Catholic, 1 independent.
Schools in Iona
Location
Demographics
The 2021 Census put Iona's population at 240, with a median age of 47. That sits as an established, older skew. Households are predominantly owner-occupied (86% own, 4% rent), which shapes everything from school catchment stability to how often properties turn over. The household mix skews family-dominated (81% family households, 15% lone person), so amenity decisions tend to follow what families want: parks, schools, supermarkets.
- Population
- 240
- Median age
- 47
- Family households
- 81%
- Lone person
- 15%
- Owner occupied
- 86%
- Renter occupied
- 4%
Demographics data as of May 2026· ABS 2021 Census
Crime and safety
3 offences recorded in 2026
Top offence categories
Source: State Police Open Data
Crime data as of December 2026
Weather year-round
- Annual rainfall
- 861 mm
- Hottest month, avg max
- 26.4°C
- Coldest month, avg min
- 5.7°C
Rainfall by month
Our 1991 to 2020 averages of SILO data (Queensland Government, built from Bureau of Meteorology observations, CC BY 4.0) for this location.
Climate data as of October 2026· SILO (Queensland Government), from Bureau of Meteorology observations
Questions about Iona
- What is the Iona postcode?
- Iona is in the 3815 postcode, in VIC, in the Cardinia Shire Council region.
- Where is Iona?
- Iona is a suburb in the Cardinia Shire Council area, VIC 3815.
- What schools are in Iona?
- There are 6 schools serving Iona on this page, including Bunyip Primary School, Garfield Primary School, Columba Catholic School.
- What suburbs are near Iona?
- Iona is close to Vervale, Catani, Modella, Garfield, Bunyip.
- What is the population of Iona?
- The population of Iona is approximately 240 (2021 Census). The median age is 47.
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Sources. House and unit medians from the NSW Valuer General, Land Victoria, the SA Government and the ABS; rents from the state rental bond authorities. Census from the ABS (2021), climate from the Bureau of Meteorology, hazard from Geoscience Australia, schools from ACARA and crime from state police open data. Each figure carries its source and date. How we source data
How we’re paid. The guides and this page are free. When a seller asks, we introduce one local agent, and the agent pays us a flat fee for the introduction, never a share of their commission; it costs the seller nothing. If a figure looks wrong, tell us and we’ll fix it.