Cocoroc is a rural locality in Victoria, Australia, 44 km south-west of Melbourne's central business district. Its local government area is the City of Wyndham. Cocoroc's history starts in 1892 when the Melbourne and Metropolitan Board of Works established the Metropolitan Sewage Farm on the western bank of the Werribee River, to treat the effluent from Melbourne's new sewerage system. This area was isolated and too far from Melbourne, so a village was built to house the workers, which became the town of Cocoroc.