Luddenham is a suburb of Sydney, in the state of New South Wales, Australia 42 kilometres west of the Sydney central business district, in the local government areas of the City of Penrith and City of Liverpool.

Luddenham takes its name from a property which was situated between South Creek and the Nepean River that was owned by John Blaxland, who received a grant of 6,710 acres (27.2 km2) on 30 November 1813.

His elder brother was the more famous Gregory Blaxland and Luddenham was the name of their family property in Kent, England.

[3] The first Luddenham Post Office opened on 1 January 1857 and was renamed Bringelly in 1863.

80.2% of people were born in Australia; the next most common birthplaces included Italy 2.1%, Malta 1.5%, England 1.2%, Lebanon 1.1%, and Fiji 1.0%.