Vincentia is a town in New South Wales, Australia in the City of Shoalhaven, on the shores of Jervis Bay. It is roughly 25 kilometres s…Vincentia is a town in New South Wales, Australia in the City of Shoalhaven, on the shores of Jervis Bay. It is roughly 25 kilometres southeast of Nowra, and approximately 200 kilometres south of Sydney. At the 2016 census, the population of Vincentia was 6,686. It is also a tourist spot with a beach area featuring white sand and a number of motels.