St. Patrick's Marist College (abbreviated as SPMC) is a private Roman Catholic co-educational secondary school located in Dundas, a suburb of Sydney, Australia.

The college was founded by the Marist Brothers as a primary school catering for boys at Harrington Street in The Rocks in 1872.

With diminishing numbers of residents in the inner city, it was decided to move the campus to Dundas in 1962[11] The new site retained much of the traditions and customs of the old St Patrick's, thus forging a strong link with the original school at Harrington Street.

The school was renamed St Patrick's Marist College by Brother Michael Procajlo when the first co-educational group was enrolled in Year 7 in 1992.

The school is located on the corner of Kirby Street and Kissing Point Road in Dundas, a suburb of Sydney.

The college is centred on the Harrington Courtyard, named in honour of the original locale of the school in The Rocks.

The school also contains a covered Senior Yard area, where students from Years 11 and 12 sit at break periods.

Upon enrolment at the college, students are divided amongst six homeroom groups: Chavoin (Jeanne Marie Chavoin), Edwin (Brother Edwin Farrell), Ludovic (St Ludovic), Mackillop (Mary MacKillop), Paul (St Paul) and Xavier (Francis Xavier).

St Patrick's Marist College is also home to ‘Wiyanga’, a purpose-built state-of-the-art facility that offers students with High Support Needs an alternate platform for learning and inclusion in Catholic Education Diocese of Parramatta system of schools.