Leeson Ah Mau (born 20 December 1989) is a former professional rugby league footballer, who has represented both Samoa and New Zealand at international level.

He previously played for the Warriors, North Queensland Cowboys and the St George Illawarra Dragons in the National Rugby League.

[8] Ah Mau scored his first NRL career try in the round 22 Queensland derby match against the Brisbane Broncos in the Cowboys 26–34 loss at 1300SMILES Stadium.

[9] Ah Mau went on to be named the Cowboys' rookie of the year for the 2010 season, having made 18 first-grade appearances and scoring a try.

In round 1 of the 2012 NRL season, in the season opener against the Newcastle Knights at Hunter Stadium, Ah Mau made his club debut for the St George Illawarra Dragons off the interchange bench in the Dragons golden point extra time 15–14 win.

[13] On 3 May 2014, Ah Mau played for Samoa in the 2014 Pacific Rugby League International against Fiji at Penrith Stadium.

[21] On 7 May 2016, Ah Mau played for Samoa in the 2016 Polynesian Cup against Tonga, where he started at second-row in the 18–6 win at Parramatta Stadium.

[23] On 6 October 2017, Ah Mau was selected for Samoa to participate in their 2017 World Cup campaign,[24] and played in all four of their matches.