Newnham is a residential locality in the local government area (LGA) of Launceston in the Launceston LGA region of Tasmania. The locality is about north of the town of Launceston. The 2016 census recorded a population of 6453 for the state suburb of Newnham. It is a suburb of Launceston. Newnham is located on the East Tamar Highway, on the eastern side of the Tamar River.
The University of Tasmania, Australian Maritime College and TasTAFE have a campus in Newnham. Mowbray Indoor Sport 'n' Skate is also located in this area.
Newnham was gazetted as a locality in 1963.
The suburb was nearly named "Mowbray Heights" in 1961, but this was not gazetted.
The waters of the Tamar River form the south-western boundary.
Route A8 (East Tamar Highway) runs through from south to north.