Osterley is a small rural suburb of the Port Stephens local government area in the Hunter Region of New South Wales, Australia. Most of the small population lives in the elevated part of the suburb along Hinton Road, east of Barties Creek which is a tributary of the Hunter River. The area to the west of Barties creek is low-lying and subject to periodic flooding. .In 2016 117 people live there with a median age of 46.