Located in South Australia within the Onkaparinga local government area, Willunga South is a small, quiet locality (postcode 5172). With a population of 470, the suburb has an older-leaning population with a median age of 48. Households earn a median income of $103K per year, with an average household size of 2.7 people. Recent annual estimates show population movement staying broadly stable across the broader catchment, with population growth running at +0.9% year-on-year at the LGA level. SA employment has moved +1.6% year-on-year in the official ABS Labour Force trend series, which provides the broader jobs backdrop for this suburb. SA also had 21 Commonwealth-backed major projects under construction, 7 underway, and 7 in planning as at 2025-09-01, which is useful as a broader delivery backdrop rather than a suburb-specific project count. The most common occupations are professionals, technicians & trades, community & personal service. Employment in the area leans toward healthcare and construction. The top ancestries reported are English, Australian, Scottish.
The median house price in Willunga South is $1.4 million, having fallen sharply by 48.6% over the past year. The current median weekly rent is $500. This gives a gross rental yield of approximately 1.9%. The median monthly mortgage repayment is $1,733.
The crime rate in the Onkaparinga LGA is below average at 2,979 incidents per 100,000 population.
On the investment side, Willunga South shows a gross rental yield of approximately 1.9%, rated as low yield. Property prices are above the state median ($1.4M/$980K), placing it in the premium segment. The price-to-income ratio of 13.6x is considered stretched. House prices have moved -48.6% year-on-year. Population growth of +0.9% year-on-year points to stable demand fundamentals. Building approvals have changed +0% year-on-year, indicating steady development activity.