Rennie is a town community in New South Wales, Australia. It is in the south-east of the Riverina about 10 kilometres south of Savernake an…Rennie is a town community in New South Wales, Australia. It is in the south-east of the Riverina about 10 kilometres south of Savernake and 19 kilometres from Mulwala. Rennie Post Office opened on 1 February 1937 and closed in 1989.