McMahons Point is a harbourside suburb on the lower North Shore of Sydney, New South Wales, Australia. McMahons Point is located 3 kilometres north of the Sydney central business district, in the local government area of North Sydney Council. McMahons Point sits on the peninsula flanked by Berrys Bay to the west and Lavender Bay to the east. The lower tip of the peninsula is known as Blues Point, which offers expansive views of Port Jackson (Sydney Harbour). The postcode is 2060.

Once predominantly working-class, it is now among Sydney's most exclusive localities. McMahons Point is primarily a medium-to-high-density residential area and is bordered by the surrounding suburbs of Waverton, North Sydney and Lavender Bay. Real estate north of Sydney Harbour in this collection of villages is set at a premium due to the area's low crime rate, cafes, restaurants, pubs, parks, accessibility to bus, train and ferry networks plus expansive views of the Sydney City CBD.

McMahons Point is named after Maurice McMahon, an Irish manufacturer of brushes and combs who, in 1864, built his home on the headland. He became mayor of the borough of Victoria (later North Sydney) in 1890.

The original occupants of this region were the Cammeraygal. These people lived along the foreshores and in bushland, cliffs and rock shelters prior to European settlement.

Land in this area was originally settled and farmed by James Milson (1785-1872), a Napoleonic War veteran, in 1806. Further grants were subsequently made in 1817 to Billy Blue, a Jamaican convict turned Sydney Harbour waterman, which remained within his family until the 1850s. Subsequently, the estate was progressively subdivided, with the earliest developments occurring on the northern end. Blues Point Road had been gazetted from 1839 as a thoroughfare from the ferry wharf to the St Leonards township. Most of the middle and southern sections of the peninsula were subdivided by the 1870s. A tram line was extended to McMahons Point in 1909, further stimulating development, particularly along Blues Point Road.

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