Marrickville is a suburb in the Inner West of Sydney, in the state of New South Wales, Australia. Marrickville is located 7 kilometres south-west of the Sydney central business district and is the largest suburb in the Marrickville Council local government area. The suburb contains three post offices with the postcode 2204.

Marrickville sits on the northern bank of the Cooks River, opposite the suburbs of Earlwood and Undercliffe and shares borders with Stanmore, Enmore, Newtown, St Peters, Sydenham, Tempe, Dulwich Hill and Petersham. The southern part of the suburb, near the river, is known as Marrickville South and includes the historical locality called The Warren.

The main shopping strip runs along Marrickville Road, west from Sydenham to the town hall. Typical businesses include cafés, grocery and clothing stores. Marrickville Road is well-known for the artwork, by Ces Camilleri of Creative Artistic Steel, that adorns the awnings of some of its businesses, which gives the strip a unique style. The shopping strip also extends south along Illawarra Road, past the railway station, to 'The Warren' locality. Marrickville Metro Shopping Centre is located near the border with Enmore and contains supermarkets, discount stores, specialty shops and a food court. A substantial light industrial area is located west of the Princes Highway. Typical industrial uses include automotive repair, import/export and building supplies.