Rieko Edward Ioane (/uɑːneɪ/; born 18 March 1997) is a New Zealand rugby union player who plays as a centre or wing for the Blues in Super Rugby and Auckland in the Bunnings NPC. He plays for New Zealand at international level.

Rieko Edward Ioane was born on 18 March 1997 in Auckland, the son of Sandra Wihongi and Eddie Ioane. He and his parents migrated to Japan during his early life after his father got a job playing professional rugby union in the country for Ricoh Black Rams. Growing up in New Zealand, he attended University of Auckland and Auckland Grammar School. While at secondary school, Ioane was chosen to play for Grammar first XV at the age of sixteen. He spent two years representing the side.

He is the younger brother of Māori All Blacks, Blues, Auckland and New Zealand Sevens team-mate Akira Ioane. Their parents were also rugby players, with father Eddie Ioane a former Samoan international lock who represented the country at the 1991 Rugby World Cup and mother Sandra Wihongi a former lock for the Black Ferns internationally.

At 17 years old, Ioane made his Sevens debut at the 2015 Wellington Sevens tournament and only a year later he was part of the New Zealand Sevens Team competing at the 2016 Summer Olympics. Ioane won the award for All Blacks Sevens Player of The Year later in the year, at the NZ Rugby Awards on 15 December 2016.

Ioane was signed for Auckland in 2015 and the Blues in 2016, instantly becoming regular starters for both teams at outside centre. Ioane was just 17 years old when he made his debut for Auckland, becoming one of the youngest players to be selected at a Provincial level in New Zealand.

Ioane was called up to the senior New Zealand squad for the 2016 Rugby Championship as injury cover for Waisake Naholo after Naholo tore his hamstring against Australia. Ioane made his debut during the end of the year tour off the bench against Italy on 12 November 2016, replacing Israel Dagg in the 50th minute. He scored his first try for the All Blacks in the 73rd minute to help them to a 68-10 victory. Making his debut at the age of 19 years and 239 days, Rieko Ioane became the eighth youngest All Blacks Test debutant. Ioane was not named in the squad to play against Ireland the following week, but came off the bench in the next game against France to replace Ryan Crotty in the 44th minute, in front of 78500 people.

Ioane opened the 2017 Super Rugby season's first game with a hat-trick against the Melbourne Rebels. Ioane was one of the highest try-scorers of the 2017 Super Rugby season, leading the Blues with 10 tries. Following Sonny Bill Williams' long-awaited return to rugby from an injured achilles in 2017, Ioane was shifted to the left wing for the Blues halfway through the season to accommodate for Williams starting at inside centre and George Moala moving to outside centre.

Ioane was named to start on the left wing in the Blues' historic match against the British & Irish Lions and was one of the standout players in the fixture, crossing over the try-line three times in the fixture, but two of the potential tries were ruled out so Ioane contributed only five points to a 22-16 win. Ioane was named in the All Blacks squad for the 3-test Lions series the following day.