Wedderburn is a suburb of Sydney, in the state of New South Wales, Australia. Wedderburn is located 57 kilometres south-west of the Sydney central business district, in the local government area of the City of Campbelltown and is part of the Macarthur region.
Wedderburn is the only Campbelltown suburb on the right bank of the Georges River. The steep gorge and heavy bush, gives it a small country town atmosphere, rather than a suburb. The causeway on Wedderburn Road, which provides the main link to Campbelltown, is known to flood during heavy rain, increasing Wedderburn's isolation.
A small airport, Wedderburn Airport operated by the New South Wales Sports Aircraft Club is located to the south of the suburb.