Tomago is a combined industrial/semi-rural suburb of the Port Stephens local government area in the Hunter Region of New South Wales, Australia.

[1] It is located just north of the Hunter River and west of the body of water known as Fullerton Cove.

[3] In 2016 277 lived in Tomago with a median age of 55, 72.7% born in Australia and 80.4% only speaking English at home.

There is no direct access to the land portion of the neighbouring suburbs of Tarro, Kooragang or Fullerton Cove.

[10][11] The Hunter Region Botanic Gardens are adjacent to the eastern side of the Pacific Highway in the north of the suburb.