North St Marys, NSW 2760

Residential suburb about 47 km west of the Sydney CBD that Wikipedia describes as 'an extension of the adjoining suburb of St Marys', with 4,123 residents at the 2021 census. Its post-war character dates to the 1940s, when the Commonwealth bought largely vacant land — part of an 1820 grant Phillip Parker King named Triangle Farm — to house workers at the St Marys munitions factory. Locals describe a quiet, safe and affordable family suburb: a resident of 25 years calls North St Marys 'quiet, safe, affordable… for families', while other reviewers note it is 'a work in progress' where run-down older houses sit alongside brand-new ones, and expect newer housing as the airport metro and Western Sydney Airport build-out progress (Homely reviews). Suburb guides frame it as an affordable Western Sydney option for families, first-home buyers and investors, 'just minutes from St Marys Station' (Homely).

At a Glance

Transport

North St Marys has no railway station; residents use St Marys station, just across the railway line in the adjoining suburb, about 1.4 km from homes in the south of North St Marys (REA listing, 6 & 6A Warrego Street). T1 Western Line trains run frequently from St Marys — locals report city services about every 20 minutes — and St Marys is the upcoming interchange for the Sydney Metro Western Sydney Airport line. Local bus services connect North St Marys with St Marys station and Penrith, with a long-time resident reporting the local bus runs about every 15 minutes (Homely). The suburb fronts the Mamre Road corridor, with M4 Motorway access via St Marys.

Schools

St Marys North Public School — NSW government primary school (K–6) in the suburb, which says it 'proudly serve[s] the families of North St Marys' (NSW DoE school website; Good Schools Guide lists the school in North St Marys 2760). Chifley College Dunheved Campus — NSW government secondary school for Years 7–10 at 120 Maple Road, North St Marys, part of the Chifley College network (NSW DoE). Listing data confirms North St Marys homes sit in the catchment of both schools. Senior students typically continue at St Marys Senior High School in neighbouring St Marys.

Shopping & Amenities

North St Marys is almost entirely residential, with only minimal in-suburb retail — a 24-hour McDonald's at the Forrester/Boronia Roads corner branded 'St Marys North' and small local strips that agent listings describe as within walking distance of homes. Everyday shopping is done in adjoining St Marys, whose town centre lies just across the railway line: St Marys Village Shopping Centre on Charles Hackett Drive and the Coles-anchored Station Plaza, plus the Queen Street commercial strip. Homely reviewers describe shops, community centres and clubs all within easy reach of the St Marys centre (Homely).

Parks & Outdoors

Robin Wiles Park in North St Marys has a playground, picnic tables, an open grassed area and a walking track encircling the whole park. Smaller neighbourhood playgrounds are scattered through the suburb's streets (ActiveActivities lists playgrounds across North St Marys 2760). For larger sports and recreation, residents cross into adjoining suburbs: South Creek Park and Blair Oval athletics field with its BMX pump track at the western end of St Marys, and Ridge Park (Cec Blinkhorn Oval), Oxley Park's main sporting ground.

Property Market

The median house price in North St Marys was around ~$1.04M — median house sale price from 19 recorded transactions (NSW Valuer General data via soldnsw.com, retrieved Sep 2026); 2026 trackers range $995,000–$1,069,000 (auspropertyinsights $995,000; propradar $1,021,000 across 9 tracked sales; property.com.au $1,069,000) (mid-2026). See our full Sydney property price map for how the suburb compares across the city. House medians cluster around $1.0–1.1M with fast recent growth — property.com.au reports 12.3% annual compound house growth and htag about +13.3% year-on-year (2025–26) — but small sales counts (9–19 house sales per tracker) make the median volatile. Stock is predominantly post-war single-storey houses on generous blocks, with a visible mix of original, renovated and brand-new homes plus granny-flat redevelopments (Homely reviews; REA listings such as 6 & 6A Warrego Street and 57 Boronia Road). As a single-block example, Domain values 133 Boronia Road at roughly $1.16M with a $1.0–1.32M range.

New Developments

Development in North St Marys is mostly low-key residential infill — original post-war homes being renovated, replaced or extended, with new builds and granny flats appearing throughout the suburb (Homely reviews; REA listing for 6 & 6A Warrego Street, a 670 m² block redevelopment 1.4 km from St Marys station). The biggest catalyst sits on its doorstep: St Marys station is being rebuilt as the interchange for the Sydney Metro Western Sydney Airport line to the Badgerys Creek Aerotropolis, and that anticipation has already produced new multi-storey apartment development in neighbouring St Marys.

Jobs & Local Economy

North St Marys' local employment base is modest: retail and service jobs in the nearby St Marys town centre, plus schools and community services in the suburb itself. The adjoining Dunheved precinct — described by Wikipedia as the northern portion of St Marys that is 'abundant with trade (especially automotive), manufacturing, waste processing, and storage centres' — is the main local industrial employer, and reviewers note the Dunheved industrial area is only streets away. Many residents commute to the city on the T1 line, and locals expect employment growth tied to the airport metro and Western Sydney Airport (Homely).

Nearby Suburbs

St Marys, Oxley Park, Ropes Crossing, Mount Druitt, Tregear

Sources & method

Researched 4 September 2026 from named public sources — census and government records, transport authorities, council and planning documents — plus published sales data. Where sources disagree on a figure, the guide says so rather than picking one.

Sources cited in this guide:

• Wikipedia — St Marys
• NSW Government

Corrections are welcome — if something here is out of date or wrong, tell us and we will fix it.

Back to all Sydney suburb guides.