Mathew Feagai (born 14 February 2001) is a Samoa international rugby league footballer who plays as a winger or centre for the St. George Illawarra Dragons in the National Rugby League (NRL).

Feagai was born in Hastings, New Zealand, and is of Samoan descent. His twin brother, Max Feagai, also plays rugby league.

Feagai played his junior rugby league at the Leeton Greens in Group 20 Rugby League.

In 2019, he was selected for both the New South Wales Under-18's team and the Australian Schoolboys team after an impressive year where he won the 2019 S. G. Ball Cup with the Illawarra Steelers.^{[citation needed]}

Feagai made his debut in round 9 of the 2021 NRL season for St. George Illawarra in their 32–12 victory against Canterbury-Bankstown, scoring a try. Feagai played eight games throughout the season as St. George Illawarra finished 11th and missed the finals.

During round 6 of the 2022 NRL season Feagai scored a double as the St. George Illawarra in their 21-16 win over the Newcastle Knights.

In round 25, Feagai scored two tries for St. George Illawarra in their victory over Brisbane.

In October Feagai was named in the Samoa squad for the 2021 Rugby League World Cup.