Teigan O’Shannassy (born 14 April 1999) is an Australian netball player in the Suncorp Super Netball league, playing for Giants Netball. O’Shannassy was elevated to the Giants senior team ahead of the 2019 season, after having been a training partner with the extended Giants squad the previous two years. The Giants elevated O’Shannassy into the line-up despite the fact she suffered a serious Achilles injury whilst representing the New South Wales Institute of Sport at the Super Club tournament in New Zealand. Prior to that setback she claimed a silver medal with the Canberra Giants in the Australian Netball League in 2018 and represented Australia at the World Youth Cup the previous year.