Lalor Park is a suburb of Sydney, in the state of New South Wales, Australia. Lalor Park is located 35 kilometres (22 mi) west of the Sydney central business district in the local government area of the City of Blacktown. Lalor Park is part of the Greater Western Sydney region. Lalor Park is commonly abbreviated as 'L.P'.

According to the 2021 census of Population, there were 7,834 people in Lalor Park.

• Aboriginal and Torres Strait Islander people made up 3.8% of the population.
• 63.8% of people were born in Australia. The most common other countries of birth were India 3.9%, Philippines 3.4%, New Zealand 2.2%, England 1.5% and South Korea 1.3%.
• 64.6% of people only spoke English at home. Other languages spoken at home included Arabic 3.9%, Tagalog 2.0%, Punjabi 1.9%, Korean 1.7% and Tamil 1.5%.
• The most common responses for religion were No Religion 26.0%, Catholic 25.1% and Anglican 11.0%.

Although the suburb is primarily residential there is a significant retail shopping precinct with about thirty shops including a newsagents, pharmacy and a small supermarket located at the junction of Northcott Road and Freeman Street.

Lalor Park is the location of a number of educational institutions including:

• Lalor Park Preschool - A community based preschool
• Lalor Park Public School - K-6 public primary school founded in 1959
• St Bernadette's Primary - systemic Catholic K-6 Primary School founded 1960 by the Sisters of St Joseph

Lalor Park Kookaburras Rugby League Club was established in 1959. They compete in the Parramatta Junior Rugby League. The club's colours are blue, brown and white. Home ground for the Kookaburras is Cavanagh Reserve (Venn Ave, Lalor Park). Lalor Park juniors that have played 1st grade in Australia include Mick Delroy, Feleti Mateo and Jorge Taufua and Brett Delaney.

The suburb is served by the Blacktown-Parklea branch of the North-West T-way and Sydney Trains Seven Hills railway station.

33°46′00″S 150°55′40″E / 33.76667°S 150.92778°E / -33.76667; 150.92778