Thadius Katua (born November 4, 1997) is a boxer who represented Papua New Guinea at the 2016 Summer Olympics in Rio de Janeiro.

[6] Despite being outscored by opponent Adlan Abdurashidov in all three rounds, Katua's coach believed that he may have actually won the fight if the points had been tallied differently.

When the judges ruled in favor of Abdurashidov many in the crowd voiced their support for Katua.

[7] Before taking part in the Olympics Katua had become the first Papua New Guinean to win a gold medal at the Commonwealth Youth Games in 2015.

[8] Katua made his professional debut on 4 Apr 2023 against Mikaele Ravalace, where he lost via TKO in the 5th round.