Krystian Mapapalangi (born 4 November 2002) is an Australian professional rugby league footballer who plays as a centre and five-eighth for the Newcastle Knights in the NRL.
Ahead of the 2022 season, Mapapalangi signed a 2-year contract to be a development player with the Knights' NRL squad. In August, his contract was extended until the end of 2024 and upgraded into the top 30 squad. In round 23 of the 2022 NRL season, he made his NRL debut for the Knights against the Canberra Raiders.