Nathan Fien, Australian-New Zealand rugby league player
Nathan Fien (born 1 August 1979), also known by the nickname of "Fieny", is a former New Zealand international rugby league footballer who played as a hooker, five-eighth and halfback in the 2000s and 2010s.

He last played for the St. George Illawarra Dragons in the National Rugby League. A former Queensland State of Origin representative hooker, halfback or five-eighth, he previously played club football with the North Queensland Cowboys and New Zealand Warriors before moving to St. George in 2009.

He was a member of the 2008 World Cup winning New Zealand team and a member of the 2010 NRL (National Rugby League) Premiership winning St. George Illawarra Dragons. Fien played in all four of the Kiwi's 2010 Four Nations internationals at halfback, including scoring the match winning try in the 79th minute of the final. Fien's impressive late season form saw him winning the halfback spot in Rugby League World's 2010 team of the year.