Oyster Bay is located 26 kilometres south of the Sydney CBD and takes its name simply from the abundance of oysters that had been found in the bay. Oyster Bay is a naturally beautiful suburb on the southern bank of the Georges River and from the waterway is a picturesque residential area. Green Point and Caravan Head are localities within the suburb of Oyster Bay. Green Point is home to the Green Point Observatory, home of the Sutherland Astronomical Society. Coronation Bay is also located on the Georges River between Green Point and Caravan Head. At Coronation Bay there is a large mangrove area that creates a diverse and dynamic eco-system, which supports a variety of bird-life. Carina Bay is located on the western boundary of the suburb.
Oyster Bay enjoys a delightful, natural setting, with many tree lined streets. The suburb consists of family homes, some enjoying waterviews or waterfrontage.