Lock at a glance
Walk score
36
Car dependent
Population
253
Median age 38
The brief
What to know about Lock.
The postcode for Lock is 5633 (SA).
Lock (5633) sits in the Cleve region of South Australia.
Lock has roughly 253 residents, with a typical family-age mix. Households are mostly owner-occupied. Daily life is car-friendly: most residents drive to work, school and the shops.
Day to day
What it’s like to live here.
Lock scores 36/100 on walkability, which makes it car-friendly with limited public transport. Plan for two cars in a typical household, especially if work isn't local.
Who lives here
Demographics.
The 2021 Census put Lock's population at 253, with a median age of 38. That sits as a typical family-age mix. Households are mostly owner-occupied (67% own, 26% rent), which shapes everything from school catchment stability to how often properties turn over. The household mix skews family-dominated (63% family households, 38% lone person), so amenity decisions tend to follow what families want: parks, schools, supermarkets.
Population
253
Median age
38
Family households
63%
Lone person
38%
Demographics data as of May 2026· ABS 2021 Census
Market
The price of a home here.
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.
Rental and ownership
Weekly rent (house)
$123/wk
Weekly rent (unit)
$230/wk
Owner occupied
67%
Renter occupied
26%
At a deeper level
253
Median age: 38
Rental data as of March 2026· rental-sa
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Safety
Crime and safety.
1
total offences in 2025-26
Top offence categories
Crime statistics are reported at LGA level and may cover a broader area than this suburb.
Source: State Police Open Data
Crime data as of June 2026· State Police Open Data
Getting around
Walkability.
36
0
0
Scores calculated from OpenStreetMap data (ODbL)
Walkability data as of May 2026· OpenStreetMap
Place
Location.
Amenities
Transport
Education
Schools in Lock.
Local schools for Lock
View the catchment for each school to find out more.
Government School Catchment
Lock Area School
© ACARA, licensed under CC BY 4.0.
Frequently asked
About Lock.
- What is the Lock postcode?
- Lock is in the 5633 postcode, in SA, in the Cleve region.
- Where is Lock?
- Lock is a regional suburb in SA, postcode 5633, in the Cleve region.
- What is the average rent in Lock?
- The median weekly rent for houses is $123, for units it's $230.
- What schools are in Lock?
- There are 1 schools serving Lock on this page, including Lock Area School.
- How walkable is Lock?
- Lock has a Walk Score of 36 out of 100, car-dependent for most errands. transit score 0, bike score 0.
- What suburbs are near Lock?
- Lock is close to Ulyerra, Warrachie, Ulyerra, Murdinga, Hambidge.
- What is the population of Lock?
- The population of Lock is approximately 253 (2021 Census). The median age is 38.
For Sale
Lock
Buying
Selling
Side by side
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Sources cited
Median, growth and rental data from state revenue offices and ABS. Census from ABS 2021. Climate from BoM. Hazard from Geoscience Australia. School data from ACARA. Crime from state police open data. Full methodology →
Always dated
Every figure on this page carries its source and as-of date in a tooltip. If a figure looks off to you, tell us and we’ll fix it within a week.
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