Flagstaff Hill SA

Postcode 5159 · Onkaparinga LGA

Flagstaff Hill is a well-established suburb in South Australia within the Onkaparinga local government area (postcode 5159). With a population of 10,184, the suburb has an established demographic with a median age of 43. Households earn a median income of $108K per year, with an average household size of 2.7 people. The most common occupations are professionals, managers, clerical & administrative. The top ancestries reported are English, Australian, Scottish.

The median house price in Flagstaff Hill is $1.0 million, having grown strongly 9.4% over the past year. Units have a median price of $612,000 (+21.7% YoY). The current median weekly rent is $688. This gives a gross rental yield of approximately 3.5%. The median monthly mortgage repayment is $1,733.

Flagstaff Hill is served by 2 schools, including 2 primary. The average ICSEA score is 1070, which is above the national average of 1,000. Public transport access includes 40 bus stops. The crime rate in the Onkaparinga LGA is low at 933 incidents per 100,000 population.

From an investment perspective, Flagstaff Hill offers a gross rental yield of 3.5%, rated as moderate yield. Property prices are near the state median ($1.0M/$950K). The price-to-income ratio of 9.4x is considered moderate. House prices have moved +9.4% year-on-year.

INVESTMENT SIGNALS
Rental Yield3.5% Moderate Yield
Price vs State$1.0M/$950K Near Median
Affordability9.4x Moderate
Price Momentum+9.4% Rising
INCOME (ATO 2022-23)
Median Income$60,397
Mean Income$71,397
Earners7,464
YoY Change+4%
SEIFA INDEX (ABS)
Advantage9/10
Education8/10
Economic8/10
Disadvantage9/10
MEDIAN HOUSE
$1.0M
9.4% YoY
MEDIAN UNIT
$612K
21.7% YoY
MEDIAN RENT /WK
$385
POPULATION
10,184
DEMOGRAPHICS
Median Age43
Household Size2.7
HH Income /wk$2,080
Personal Income /wk$844
Mortgage /mth$1,733
CRIME (Onkaparinga LGA)
Crime Rate (per 100k)933
Total Incidents95
TRANSPORT
Bus Stops40
SCHOOLS (2)
Avg ICSEA1070
Total Students858
Government2
Flagstaff Hill Primary SchoolPrimary · Government · ICSEA 1067
Craigburn Primary SchoolPrimary · Government · ICSEA 1074
Data: 2025-Q4