PropertyFlags · suburb data

St Marys NSW — property data & flags

Suburb-level context for St Marys from official sources — and the address-level red, yellow and green flags we check before you make an offer or sign a lease.

Check an address in St Marys — free flag count →

Property crime — St Marys vs NSW

Break-ins to homes
482.8 incidents per 100,000 residents · 127% above the NSW rate (212.3) · higher than 90% of NSW suburbs
Car theft
384.7 incidents per 100,000 residents · 125% above the NSW rate (171.2) · higher than 90% of NSW suburbs
Theft from cars
792.1 incidents per 100,000 residents · 168% above the NSW rate (295.4) · higher than 94% of NSW suburbs
Theft from homes
596 incidents per 100,000 residents · 204% above the NSW rate (196.2) · higher than 95% of NSW suburbs
Malicious property damage
1395.6 incidents per 100,000 residents · 152% above the NSW rate (553.8) · higher than 93% of NSW suburbs

Property offences only, per 100,000 residents, latest 12 months (Apr 2025–Mar 2026). Population 13,256 (2021 Census). Percentile computed across the 945 NSW suburbs with 2,000+ residents. Suburb-wide figures, not any one street. Violent-crime categories are deliberately not shown. Data sourced from the NSW Bureau of Crime Statistics and Research (BOCSAR) and the Australian Bureau of Statistics, snapshot 2026-07-24.

What's coming to St Marys

The ABS area covering St Marys (St Marys - North St Marys) is projected to go from 17,474 residents (2021) to 22,067 by 2041 — a change of +26.3%, passing 19,979 by 2031.

Population figures are projections (DPHI 2024 NSW Population Projections (2022–2041 series)) for the ABS statistical area, not a guarantee. Project lists: School Infrastructure NSW and Health Infrastructure / Homes NSW public project pages (snapshot 2026-07-26); a "Planning" status is not a commitment — projects change, slip and get cancelled. The paid address report adds state-budget projects and growth-area checks around the specific address.

What we check at the address level

Suburb averages can't tell you about one specific property. The full PropertyFlags report checks the address itself against official government layers — flood and bushfire mapping, zoning and height controls, development applications nearby, EPA contamination records, defect orders, aircraft and road noise, school catchments and more — and turns them into red, yellow and green flags with the questions to ask the agent.

Run a free flag count on an address in St Marys → · See a sample report · All NSW suburbs